Section 11.8: fix RS integrators from issue #517#528
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Example 11.8.6 uses alpha(x) = x^2, and Exercise 11.8.5 integrates against sgn. Co-authored-by: Cursor <cursoragent@cursor.com>
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rkirov
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Jun 13, 2026
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Summary
Fixes two false statements in
Section_11_8.leanreported in #517.f_11_8_6_RS_integ): Tao uses (\alpha(x)=x^2), so the RS integral value 22 requires integrator(fun x ↦ x^2), not the identity.RS_integ_with_sign): the second conjunct should integrate againstReal.sign, notfun x ↦ -Real.sign x(jump at 0 is (-2), not (+2)).Test plan
lake build Analysis.Section_11_8Made with Cursor