chore: import upstream snapshot with attribution

2026-07-13 12:32:53 +08:00
commit 2a16f2f53b
247 changed files with 69150 additions and 0 deletions
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+# Klein J-function as function of the half-period ratio
+fp.cplot(lambda t: fp.kleinj(tau=t), [-1,2], [0,1.5], points=50000)