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Improve positivity extension for norm #5265

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urkud opened this issue Jun 19, 2023 · 0 comments · May be fixed by #10276
Open

Improve positivity extension for norm #5265

urkud opened this issue Jun 19, 2023 · 0 comments · May be fixed by #10276
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enhancement New feature or request t-meta Tactics, attributes or user commands

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urkud commented Jun 19, 2023

positivity already can prove 0 ≤ ‖x‖. Make it able to prove 0 < ‖x‖ from x ≠ 0.
@urkud urkud added enhancement New feature or request t-meta Tactics, attributes or user commands labels Jun 19, 2023
@ericrbg ericrbg linked a pull request Feb 5, 2024 that will close this issue
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feat: norm positivity extension proves strict positivity leanprover-community/mathlib4
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