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ZuoCen_Liu

53 karma · joined December 14, 2025

Turning the "Δt dilemma" into adaptive, continuous physics.
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ZuoCen_Liu··on `123456' password used in Danish CPR data breach
Please enter Password: Password ↵ The password is incorrect: incorrect ↵ Incorrect password, please enter again: Again ↵ ...
ZuoCen_Liu··on Show HN: Anchor Engine – Deterministic Semantic Memory for LLMs Local (<3GB RAM)
"[ Removed by moderator ] Discussion

Sorry, this post has been removed by the moderators of r/LocalLLaMA."

ZuoCen_Liu··on SIPA: Auditing Physical Integrity in World Models and Robotics(Isaac SIM,Marble)
I've been obsessed with a single question: Why do "visually stunning" simulations from engines like Isaac Sim, MuJoCo, or world models like Marble often fail the moment they are deployed on real robotic hardware?

The Theory: I am proposing the Non-Associative Residual Hypothesis (NARH). By auditing 7-DoF trajectories, we can detect the underlying physical consistency—or lack thereof—in these systems.

In plain terms: Simulators break physics into discrete computational steps (collisions, friction, constraints). In a continuous world, the order of these operations shouldn't matter. But on GPUs, swapping the execution order creates tiny, systematic differences: Non-Associative Residuals. These pile up as "Physical Debt," leading to massive sim-to-real drift in complex scenarios.

The Project: I built SIPA (Spatial Intelligence Physical Audit), an engine-agnostic tool designed to quantify this "Physical Debt" based on the NARH framework.

The Anomaly: Interestingly, within 72 hours of pushing the codebase to GitHub, it was shadow-cloned by 120 unique institutional entities via CLI, with near-zero web UI traffic. It seems the "big players" are already hunting for a way to measure the "physical honesty" of their models.

I’m sharing the full methodology and the math on ROS Discourse. I’m inviting the community to clone SIPA, test your datasets, Let's audit the truth.

Technical Post & Discussion: [https://discourse.openrobotics.org/t/sipa-quantifying-physic...]

Source & Tool: [https://github.com/ZC502/SIPA.git]

ZuoCen_Liu··on Show HN: Why Nvidia's PhysX is hitting a "SIM-to-Real" wall at 5000W
I’ve spent months digging into why dexterous manipulation (like the 'Humanoid Hand' problem Musk mentions) is still so far from reality. The culprit isn't the hardware—it's the 'Discrete Tax.'

Current solvers burn thousands of GPU cycles just to prevent numerical 'explosions' during contact. It's a brute-force patch for a math problem that should be solved with algebraic continuity. We've pushed a framework that runs at ~100W with higher stability than a 5000W H200 cluster.

I’ve officially challenged the PhysX core team on their forums to address this systemic waste.

ZuoCen_Liu··on Nvidia Brute-Force Bubble: Why 90% of Physics AI Compute Is a Mathematical Waste
The "Compute Wall" is a symptom of an efficiency bubble.

We are currently burning through H100/H200 clusters at an unprecedented scale, yet 90% of those GPU cycles are a "waste tax." We aren't calculating intelligence; we are using massive GPGPU power to "patch" 30-year-old numerical errors in discrete time-stepping (Δt).

In the race for Embodied AI, we’ve hit a wall: The Brute-Force Tax. To get high-fidelity Sim-to-Real data, we compensate for low-precision iterative solvers with massive parallelism. It’s an energetic dead-end that no amount of capital can fix—unless we change the math.

The Breakthrough: From Iteration to Hypercomplex Logic

We are introducing a New Computing Primitive based on Hypercomplex (Octonion) Manifolds. This isn't just a new algorithm; it's a structural shift in how physical state-space is represented. Unlike traditional tensors, this manifold internalizes "Time-flow" and "Interaction-coupling" into its algebraic structure.

The "One-Look" Disruption (VC Alpha):

• Current Bottleneck: Traditional Neural Networks need to "see" 10+ frames to infer velocity/force. This leads to long Transformer sequences, high KV-cache latency, and massive VRAM consumption.

• Our Paradigm: Because our state-space is inherently causal, a Transformer needs only one "look" (a single state) to understand complete motion trends.

• The Result: We drastically shorten the context window, enabling ultra-low-latency physical intuition at the edge.

Scaling to the 100W Edge (The Economic Dividend):

• The 5000W Cost: The price of "patching" bad math with GPU clusters.

• The 100W Reality: By running our Physics Algebraic Kernel on dedicated FPGA/ASIC "Causal Processors," we bypass discrete iterations entirely. We achieve data-center-level fidelity within a handheld power envelope.

The Vision: The Physics Co-Processor We are building the "Physical Brain" for the next billion robots. This hardware-native algebraic kernel provides a high-dimensional, continuous feature space that current AI chips (Orin/Jetson) crave but cannot produce.

Deep-Dive & Technical Proof on NVIDIA Discussions: https://github.com/isaac-sim/IsaacSim/discussions/394 We are looking for architects and visionaries who understand that the next leap in AI won't come from more GPUs, but from better primitives.

ZuoCen_Liu··on Show HN: 90% of GPU Cycles Are Waste. A New Computing Primitive for Physics AI
The "Brute-Force" TaxWe are burning 5000W GPGPU clusters to run brute-force discrete simulations, just to "patch" the numerical gaps of Δt. This is the Discrete Cost: to get high-fidelity Sim-to-Real data, we compensate for low precision with massive parallelism. It’s an energetic dead-end.

The Breakthrough: Hypercomplex Causal LogicWe are introducing a New Computing Primitive based on Hypercomplex (Octonion) Manifolds.

Unlike traditional tensors, this state-space internalizes "Time-flow" in its real part and "Coupling-strength" in its imaginary parts.

Why this changes AI Inference (The "One-Look" Advantage):

Traditional NNs: Need to "see" 10+ frames of images to infer velocity and acceleration.

Our Paradigm: Because the state-space is inherently causal and coupled, a Transformer needs only one "look" (a single state) to understand motion trends.

Impact: This drastically shortens the Transformer sequence length, enabling ultra-low power inference on edge devices.

The Power Dividend: 5000W vs. 100W

5000W (Discrete): The cost of brute-force GPU clusters struggling to "patch" accuracy.

100W (Algebraic): A dedicated Causal Processor (FPGA/ASIC) running our Physics Algebraic Kernel. It bypasses discrete iterations entirely, delivering data-center-level fidelity at the edge.

The Hardware VisionThis isn't just software. We are positioning the Physics Algebraic Kernel as a "Co-processor." It runs on FPGA/ASIC to provide "Physical Intuition" for the adjacent AI chip (like NVIDIA Orin/Jetson), providing a higher-dimensional, continuous feature space that current neural networks crave.

Deep-Dive on NVIDIA Discussions:https://github.com/isaac-sim/IsaacSim/discussions/394#discus...

ZuoCen_Liu··on Show HN: Solving the 5000W Compute Wall in Physics AI via Algebraic Continuity
In short:CCD is a diagnostic patch; Octonions are an algebraic cure. One checks for crashes, the other makes physics causal by design.
ZuoCen_Liu··on Show HN: Solving the 5000W Compute Wall in Physics AI via Algebraic Continuity
You are referring to Continuous Collision Detection (CCD), which has indeed existed for decades. However, CCD is a detection patch, not an integrator cure. 1. The Scaling Wall: While CCD avoids tunneling for a single pair of objects, solving it analytically for a system with thousands of constraints leads to a Non-linear Complementarity Problem (NCP) explosion. Most engines fallback to iterative solvers (like PGS or Jacobi), which brings us back to square one: high-frequency iterations to resolve 'shaking' constraints. 2. Integrator Drift: CCD finds the time of impact, but the integration still happens in discrete space. You still suffer from Numerical Dissipation (energy loss) because the state manifold is disconnected between steps. 3. The 'Why' of Octonions: Our approach isn't just 'detecting' the collision; it's about State Coupling. By using Non-associative algebra, we lock the causal dependency into the movement itself. We are replacing the O(n^2) geometric 'check-then-fix' loop with a single-pass O(n) algebraic update. In short: CCD tells you when you crashed; Octonions ensure the state update respects the causal sequence without the iterative overhead.
ZuoCen_Liu··on Show HN: Solving the 5000W Compute Wall in Physics AI via Algebraic Continuity
We are currently discussing a paradigm shift in physics simulation on the NVIDIA Isaac Sim repository. The core issue is that discrete time-stepping in GPGPU architectures is hitting a "Compute Wall"—consuming 5000W+ just to "patch" numerical errors like tunneling and jitter. The Validation:We’ve implemented an Octonion-based EKF (OEKF) that treats time and causality as an internal algebraic manifold rather than an external parameter. Verified Results in Isaac Sim:Precision: >60% position error reduction (≤0.1m vs. ≥ 0.25m). Stability: Zero attitude jitter during high-dynamic flips (traditional filters showed ≥ 3^ jitter). This isn't just a software patch; we are moving into the RTL design phase for a 100W FPGA Causal Processor to replace power-hungry GPGPU heuristics with dedicated algebraic gates. Join the technical deep-dive on NVIDIA’s GitHub Discussion:[https://github.com/isaac-sim/IsaacSim/discussions/394]
ZuoCen_Liu··on Ask HN: What are your predictions for 2026?
Let me explain again why I said "disruptive" rather than "substantial":the current "embodied artificial intelligence" still uses 19th-century numerical methods (the Adams-Bashforth integration method from 1883 and the Runge method from 1895) to represent time frames + three-dimensional space calculations to approximate four-dimensional spacetime (relativistic covariance has proven that spacetime is an integrated whole, i.e., four-dimensional spacetime). I will release more specific code later - you might wonder, don't the "scientists" at those big companies know about this? The answer is that they do know, and I will also release the reasons later, which will definitely surprise you!
ZuoCen_Liu··on Ask HN: What are your predictions for 2026?
The problem lies here: the current "embodied artificial intelligence" still uses 19th-century numerical methods (the Adams-Bashforth integration method from 1883 and the Runge method from 1895) to represent time frames + three-dimensional space calculations to approximate four-dimensional spacetime (relativistic covariance has proven that spacetime is an integrated whole, i.e., four-dimensional spacetime). I will release more specific code later - you might wonder, don't the "scientists" at those big companies know about this? The answer is that they do know, and I will also release the reasons later, which will definitely surprise you!
ZuoCen_Liu··on Ask HN: What are your predictions for 2026?
I actually meant subversive intentionally.

While 'substantive' would mean major progress within the current framework, I’m predicting a shift that subverts the current foundational assumptions of robotics.

Right now, we treat time as a secondary sequence—an 'add-on' to 3D space. Moving to a unified spacetime architecture isn't just a big improvement; it fundamentally undermines the discrete-frame logic that almost all current CV and RL models are built upon. It’s 'subversive' because it requires us to unlearn the way we’ve been processing motion for the last decade.

ZuoCen_Liu··on 'Ghost jobs' are on the rise – and so are calls to ban them
I see the parallel, but there’s a key difference in intent and scale. A candidate doing a practice interview is often a defensive reaction to a volatile market—a way to maintain a personal skill. A company posting 'ghost jobs' is a systematic corporate strategy that pollutes market data and wastes thousands of collective hours. One is an individual trying to survive the system; the other is the system itself failing to act in good faith.
ZuoCen_Liu··on 'Ghost jobs' are on the rise – and so are calls to ban them
Haha, that's unlikely.
ZuoCen_Liu··on 'Ghost jobs' are on the rise – and so are calls to ban them
I think the primary obstacle isn't the data ingestion method, but the fact that companies treat the recruitment lifecycle as a proprietary black box. From an HR perspective, transparency is a liability, not an asset. They have zero incentive to cooperate with an external 'tracking' tool because: 1Information Asymmetry is Power: If candidates knew exactly where they stood or how many 'ghost' positions existed, the company would lose its leverage in salary negotiations and timeline control. 2Legal and PR Risk: Making the pipeline visible exposes a company to accusations of bias or 'unfavorable' hiring patterns. 'Privacy' is often used here as a convenient shield to hide inefficiency or lack of intent. Even if you solved the email-scraping problem, you'd likely face Terms of Service (ToS) roadblocks or even legal threats from major corporations claiming you are 'scraping' or 'misrepresenting' their internal processes. The 'pain' of user adoption isn't just about email forwarding; it's about the fact that candidates are often too intimidated to participate in a system that might be seen as 'adversarial' to the very companies they are trying to join. We aren't just missing a tool; we are missing a safe harbor for candidate data sharing.
ZuoCen_Liu··on Sync your SSH client across every device for life
Therefore, for this project, we may still need to be cautious about promising "lifetime service"
ZuoCen_Liu··on Ask HN: Decentralized Auth for Information Exchange?
Single Sign-On (SSO) is not complicated, and platforms that provide services all have detailed tutorials.

I don't think obtaining authentication data is useful; it's better to use it for collecting data on functional experiences.

ZuoCen_Liu··on Tesla throws 'cringe' anti-union concert for Giga Berlin employees ahead of vote
Hosting a concert to prevent workers from organizing is the ultimate 'Silicon Valley Lord' move. It’s the billionaire equivalent of 'we have pizza in the breakroom so don't ask for a raise.'
ZuoCen_Liu··on Ask HN: Decentralized Auth for Information Exchange?
As an entrepreneur, this feels like a classic case of over-engineering for a problem you haven't earned yet.

Decentralized auth is a fascinating technical rabbit hole, but it introduces a massive friction point for your first 1,000 users. For a new, unproven project, credibility is your biggest bottleneck, not decentralized storage.

By building your own complex auth/privacy stack, you are asking users to trust you to get the crypto right—which is a huge leap of faith.

A more pragmatic approach: Outsource the trust. > Use 'Sign in with Google/Apple/GitHub.' You leverage their multi-billion dollar security infrastructure and their existing trust relationship with the user. It provides immediate convenience (one-click onboarding) and shifts the perceived privacy liability to a known entity.

Don't spend your innovation tokens on auth. Spend them on the core value of your information exchange. You can always 'decentralize' the back-end later once you have enough users to actually make it matter.

ZuoCen_Liu··on Denmark scraps controversial VPN ban proposal after public backlash
If your solution to copyright infringement requires criminalizing the fundamental architecture of secure communication, your problem isn't the technology—it's your desire for absolute control.
ZuoCen_Liu··on Ask HN: Is RSS Still Alive?
RSS isn't just alive; it's the only remaining protocol for deterministic content delivery. There is a fundamental philosophical divide between RSS and the current AI-driven wave that people often miss: RSS is a Push system: If I subscribe to a source, I get 100% of the signal. The 'algorithm' is my own intent. AI is a Filtering system: AI is probabilistic. Its entire job is to guess what I want, which by definition means it creates a 'lossy' stream. People claim AI can 'replace' RSS by summarizing my interests, but AI will never be able to provide the certainty of a feed. I don't want an AI to 'guess' which security advisory or niche technical blog post I should read today; I want the raw signal that I explicitly requested. As long as there are professionals who value information completeness over algorithmic convenience, RSS (or its successor) will be a hard requirement. You can't replace a pipe with a concierge.
ZuoCen_Liu··on Apple announces App Store and iPhone changes in Japan
Apple’s Japanese Compliance Strategy: Is “Safety First” Strangling Independent Educational Apps? Apple just announced sweeping changes in Japan to comply with the Mobile Software Competition Act (MSCA). While the focus is on alternative marketplaces and third-party payments, the fine print regarding "Younger Users" is concerning. Under the new rules: Under 13: Apps cannot link to websites for transactions at all. Under 18: Mandatory "Parental Gates" for any non-IAP transactions. Kids Category: Zero links to external purchase methods, period. While framed as protection against scams, this creates a massive friction taxspecifically for the education sector. Most innovative educational tools are built by small teams who can't survive on Apple's 30% (or 15%) cut but also can't afford the drop-off caused by these new "security" friction points. My concern is that this "one-size-fits-all" protection will: Deter independent developers from building for the Japanese student market. Force a consolidated market where only giant publishers with massive marketing budgets can navigate the parental friction. Create a "Compliance Moat" where Apple uses "safety" as a justifiable way to make third-party payments so annoying that parents and devs just give up. Is there a way to protect children without effectively banning the economical bypass that these new laws were supposed to enable? Or is Japan’s MSCA actually a net-loss for the educational software ecosystem?
ZuoCen_Liu··on Sync your SSH client across every device for life
The 'Lifetime Service' promise feels like a strategic red flag for a product that relies on hosted relay infrastructure. Unless this is strictly a P2P tool with zero coordination server dependency (which is difficult for cross-network SSH), the provider is essentially incurring a perpetual marginal cost for a one-time fee.

My question to the team: How do you plan to sustain the bandwidth and orchestration costs five years from now? Is there a self-hosted 'exit ramp' for users if the central coordination server goes dark?

ZuoCen_Liu··on Don MacKinnon: Why Simplicity Beats Cleverness in Software Design [audio]
While I agree with MacKinnon in principle, we must acknowledge that simplicity is a luxury enabled by the surplus of compute power. > There are domains where 'cleverness' isn't just a vanity project, but a hard requirement. Take the Fast Inverse Square Root from Quake III or modern Zero-copy networking in high-throughput systems like Kafka. If we prioritized 'simple and readable' code in those contexts, we would be leaving orders of magnitude of performance on the table.

Sometimes, 'clever' code is simply code that refuses to ignore the underlying reality of the hardware. The danger isn't cleverness itself, but unnecessary cleverness applied to problems where the bottleneck is human understanding rather than machine execution.

ZuoCen_Liu··on 'Ghost jobs' are on the rise – and so are calls to ban them
Ghost jobs are essentially the 'vaporware' of the HR world. In any other department, misrepresenting your intent to engage in a transaction would be seen as a breach of professional ethics. The fact that it has become a standard KPI for HR departments to 'keep the pipeline warm' at the expense of thousands of hours of unpaid candidate labor is a massive market failure.
ZuoCen_Liu··on GitHub walks back plan to charge for self-hosted runners
Charging for self-hosted runners was always a strategic misalignment. The primary reason teams use self-hosted is not to save money, but for security (VPC access) and specialized hardware (GPUs/ARM). Adding a tax on infrastructure that GitHub doesn't even provide or maintain felt like double-dipping. Glad to see they realized this before eroding more developer trust
ZuoCen_Liu··on Mathgpt.today Discord Bot
I just tried it, and it seems there's a problem with following up: I asked it what the non-associativity of octonions means. Its answer mentioned "unique applications in physics". I followed up with "What are the unique applications in physics?", but it answered irrelevant things.
ZuoCen_Liu··on TikTok unlawfully tracks shopping habits and use of dating apps?
This seems to be the "original sin" of the current Internet "platform" paradigm.
ZuoCen_Liu··on Gemini 3 Flash: Frontier intelligence built for speed
What type of question is your one about testing AI inference time?
ZuoCen_Liu··on Ask HN: What are your predictions for 2026?
Physical AI will make subversive discoveries that exceed everyone's expectations - space-time integrated computing, rather than the current three-dimensional spatial computing plus discrete time steps
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