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Apparently you've mistyped the name - the curve is named after a Russian-Israeli mathematician Viktor Zalgaller.

What happens for a 1 : 1.1 rectangle? it seems to me that that curve isn't optimal then. If so, what is the ratio for a rectangle where that curve becomes optimal.

If I'm reading http://wardsattic.com/joomla/Download/BellmanForestProblem.p... correctly, the ratio you're looking for is ≈ 2.0471.

That paper shows the value of visualization... I followed the Bellman Forest Problem link to the Wikipedia page on the Moser's Worm Problem[1] and it didn't do anything for me.

In Ward's paper, he summarized Moser's Worm Problem differently (p.7):

In 1966, Moser posed a related problem which roughly asks: “What's the best-shaped hammer for smashing one-inch worms?”

Great visualization!

[1] https://en.wikipedia.org/wiki/Moser%27s_worm_problem

thanks for the link!

So you’re not too far off: the optimal value is 2.27.