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[Merged by Bors] - feat: elementary estimate for Real.log#20766

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[Merged by Bors] - feat: elementary estimate for Real.log#20766
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@kebekus kebekus commented Jan 15, 2025

Generalize the theorem log_pos_iff', weakening the hypothesis hx : 0 < x to the (perhaps more natural) hypothesis hx : 0 ≤ x. Do the same for log_nonpos_iff and depreciate log_nonpos_iff'. Fix one trivial typo in a docstring of Mathlib/NumberTheory/Bertrand.lean.


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@kebekus kebekus added the t-analysis Analysis (normed *, calculus) label Jan 15, 2025
@github-actions github-actions bot added the new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! label Jan 15, 2025
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github-actions bot commented Jan 15, 2025

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@kebekus kebekus requested a review from joneugster January 15, 2025 07:25
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Why not simply generalize the existing log_pos_iff?

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kebekus commented Jan 16, 2025

@tb65536 Thanks for your comment. Generalizing the existing log_pos_iff was also my first instinct. I did not do that because I saw that the library already contains the theorems log_nonpos_iff and log_nonpos_iff', which are completely analogous to what my PR suggests.

If you reviewers believe that generalizing the existing log_pos_iff and log_nonpos_iff is the better choice, then I am absolutely fine with that. Please advise.

@grunweg grunweg changed the title Elementary estimate for Real.log feat: Elementary estimate for Real.log Jan 16, 2025
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grunweg commented Jan 16, 2025

My first instinct is also to generalise log_pos_iff instead (and apply the same change to log_nonpos_iff).

Also, one small thing: can you make sure the PR title follows the form e.g. "feat: elementary estimate for Real.log"? (Right now, that's the first line of your PR description, and the title is different. Mathlib's CI is a bit peculiar about this formatting; I've just corrected it for you.) Thanks!

@grunweg grunweg changed the title feat: Elementary estimate for Real.log feat: elementary estimate for Real.log Jan 16, 2025
@grunweg grunweg added the awaiting-author A reviewer has asked the author a question or requested changes. label Jan 16, 2025
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kebekus commented Jan 16, 2025

@grunweg @tb65536 Ok, I will follow your suggestion, generalize log_pos_iff and log_nonpos_iff, and come back to you.

@grunweg I'm Sorry about the title mishap. I will do my best to avoid that issue next time.

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grunweg commented Jan 16, 2025

Thanks! I have one more comment (probably the last one). Can you also update the PR description to match what the PR does now?

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messageFile.md

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kebekus commented Jan 16, 2025

@grunweg Updated the PR description as you requested. The message by the github-action-bot leaves me puzzled.

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kebekus commented Jan 16, 2025

I implemented your suggestions and also fixed one very obvious typo in one of the docstrings of Mathlib/NumberTheory/Bertrand.lean.

@kebekus kebekus removed the awaiting-author A reviewer has asked the author a question or requested changes. label Jan 16, 2025
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grunweg commented Jan 16, 2025

Thanks! The message by the bot should go away if you merge (or rebase on) the master branch.

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Thanks!
maintainer merge

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🚀 Pull request has been placed on the maintainer queue by grunweg.

@github-actions github-actions bot added the maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. label Jan 16, 2025
@kebekus kebekus removed the request for review from joneugster January 16, 2025 15:28
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Thanks 🎉

bors merge

@ghost ghost added the ready-to-merge This PR has been sent to bors. label Jan 17, 2025
mathlib-bors bot pushed a commit that referenced this pull request Jan 17, 2025
Generalize the theorem `log_pos_iff'`, weakening the hypothesis `hx : 0 < x` to the (perhaps more natural) hypothesis `hx : 0 ≤ x`. Do the same for `log_nonpos_iff` and depreciate  `log_nonpos_iff'`. Fix one trivial typo in a docstring of `Mathlib/NumberTheory/Bertrand.lean`.
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mathlib-bors bot commented Jan 17, 2025

Build failed (retrying...):

mathlib-bors bot pushed a commit that referenced this pull request Jan 17, 2025
Generalize the theorem `log_pos_iff'`, weakening the hypothesis `hx : 0 < x` to the (perhaps more natural) hypothesis `hx : 0 ≤ x`. Do the same for `log_nonpos_iff` and depreciate  `log_nonpos_iff'`. Fix one trivial typo in a docstring of `Mathlib/NumberTheory/Bertrand.lean`.
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mathlib-bors bot commented Jan 17, 2025

Build failed (retrying...):

mathlib-bors bot pushed a commit that referenced this pull request Jan 17, 2025
Generalize the theorem `log_pos_iff'`, weakening the hypothesis `hx : 0 < x` to the (perhaps more natural) hypothesis `hx : 0 ≤ x`. Do the same for `log_nonpos_iff` and depreciate  `log_nonpos_iff'`. Fix one trivial typo in a docstring of `Mathlib/NumberTheory/Bertrand.lean`.
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mathlib-bors bot commented Jan 17, 2025

Build failed:

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PR summary fdc34626d8

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

No declarations were harmed in the making of this PR! 🐙

You can run this locally as follows
## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.


No changes to technical debt.

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary
  • The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
  • The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

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kebekus commented Jan 17, 2025

@jcommelin It seems that my PR could not be merged because mathlib had changed meanwhile -- ironically, the conflicting change to 'master' was another PR of mine. I merged the master branch into kebekus/log and fixed the issue. Could you have a look and 'bors merge' again if all is fine? -- Thanks.

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Thanks!
bors r+

mathlib-bors bot pushed a commit that referenced this pull request Jan 17, 2025
Generalize the theorem `log_pos_iff'`, weakening the hypothesis `hx : 0 < x` to the (perhaps more natural) hypothesis `hx : 0 ≤ x`. Do the same for `log_nonpos_iff` and depreciate  `log_nonpos_iff'`. Fix one trivial typo in a docstring of `Mathlib/NumberTheory/Bertrand.lean`.
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mathlib-bors bot commented Jan 17, 2025

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title feat: elementary estimate for Real.log [Merged by Bors] - feat: elementary estimate for Real.log Jan 17, 2025
@mathlib-bors mathlib-bors bot closed this Jan 17, 2025
@mathlib-bors mathlib-bors bot deleted the kebekus/log branch January 17, 2025 12:24
Julian added a commit that referenced this pull request Jan 20, 2025
* polynomial-sequences: (149 commits)
  Aha, here's how to get Lean to stop showing S.elems' in the infoview.
  Try satisfying the linter gods again.
  Probably enough initial tidying to send the PR.
  Kill more temporary names.
  Touch more natDegree.
  Does protected satisfy the docstring linter?
  Bit shorter.
  More
  Quiet linters.
  Remove redundant imports.
  Copyright header and more twiddling.
  Rename lemma to 'degree_smul_of_leadingCoeff_rightRegular' and split out
  feat(Polynomial): polynomial sequences are bases for R[X]
  chore(Dynamics/PeriodicPts): don't import `MonoidWithZero` (#20765)
  chore(Associated): split out `Ring` results (#20737)
  feat(AlgebraicGeometry): flat morphisms of schemes (#19790)
  feat(AlgebraicGeometry): scheme-theoretic fibre (#19427)
  chore: split Mathlib.Analysis.Asymptotics.Asymptotics (#20785)
  doc: typo (#20829)
  feat(CategoryTheory): condition for an induced functor between comma categories to be final  (#20139)
  feat(1000.yaml): allow statements of theorems also (#20637)
  feat(Algebra/Homology/Embedding): homology of truncGE' (#19570)
  chore: cleanup many porting notes in Combinatorics (#20823)
  chore: eliminate porting notes about `deriving Fintype` (#20820)
  feat(Algebra/Lie): a Lie algebra is solvable iff it is solvable after faithfully flat base change (#20808)
  feat: define bases of root pairings (#20667)
  feat(Tactic): basic ConcreteCategory support for elementwise (#20811)
  feat(CategoryTheory): define unbundled `ConcreteCategory` class  (#20810)
  chore(CategoryTheory): rename `ConcreteCategory` to `HasForget` (#20809)
  feat: `CommSemiring (NonemptyInterval ℚ≥0)` (#20783)
  chore(yaml_check.py): re-format (#20807)
  feat: elementary estimate for Real.log (#20766)
  feat: definition of linear topologies (#14990)
  feat(RingTheory): flatness over a semiring (#19115)
  feat(Algebra/Homology/Embedding): the canonical truncation truncLE (#19550)
  feat(Algebra/Homology/Embedding): API for the homology of an extension of homological complex (#19203)
  feat(Algebra/Ring): `RingEquiv.piUnique` (#20794)
  feat(RingTheory/LocalRing): add instance `Unique (MaximalSpectrum R)` for a local ring `R` (#20801)
  chore(GroupExtension/Defs): define `Section` and redefine `Splitting` (#20802)
  chore: restore `def` to `adicCompletion` (#20796)
  refactor: rename `UniqueContinuousFunctionalCalculus` to `ContinuousMap.UniqueHom` (#20643)
  feat(Algebra/Homology/Embedding): the morphism from a complex to its `truncGE` truncation (#19544)
  chore(Mathlib/Computability/TuringMachine): split file (#20790)
  feat(Data/Finset/Card): add `InjOn` and `SurjOn` versions of finset cardinality lemmas (#20753)
  feat(Order/WellFoundedSet): add convenience constructors for IsWF and IsPWO for WellFoundedLT types (#20752)
  feat(Set/Finite): a set is finite if its image and fibers are finite (#20751)
  chore: cleanup .gitignore files (#20795)
  feat(Topology/Group/Profinite):  Profinite group is limit of finite group (#16992)
  feat(Combinatorics/SimpleGraph): vertices in cycles (#20602)
  CI: merge `bot_fix_style` actions (#20789)
  ...
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