imo.imo2011_q3 | Mathlib porting status

Changes since the initial port

The following section lists changes to this file in mathlib3 and mathlib4 that occured after the initial port. Most recent changes are shown first. Hovering over a commit will show all commits associated with the same mathlib3 commit.

Changes in mathlib3

5f25c089

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

08b081ea

bump to nightly-2024-03-17-08

mathlib commit https://github.com/leanprover-community/mathlib/commit/65a1391a0106c9204fe45bc73a039f056558cb83

22f01ce4

Diff

@@ -67,7 +67,7 @@ theorem imo2011_q3 (f : ℝ → ℝ) (hf : ∀ x y, f (x + y) ≤ y * f x + f (f
   · suffices : 0 ≤ f 0; exact le_antisymm (h_f_nonpos 0) this
     have hno : f (-1) = 0 := h_fx_zero_of_neg (-1) neg_one_lt_zero
     have hp := hxt (-1) (-1)
-    rw [hno] at hp 
+    rw [hno] at hp
     linarith
 #align imo2011_q3 imo2011_q3

08b081ea

bump to nightly-2023-09-24-06

mathlib commit https://github.com/leanprover-community/mathlib/commit/ce64cd319bb6b3e82f31c2d38e79080d377be451

5655435f

Diff

@@ -3,7 +3,7 @@ Copyright (c) 2021 David Renshaw. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: David Renshaw
 -/
-import Mathbin.Data.Real.Basic
+import Data.Real.Basic
 
 #align_import imo.imo2011_q3 from "leanprover-community/mathlib"@"08b081ea92d80e3a41f899eea36ef6d56e0f1db0"

08b081ea

bump to nightly-2023-07-20-09

mathlib commit https://github.com/leanprover-community/mathlib/commit/8ea5598db6caeddde6cb734aa179cc2408dbd345

9c56d0dd

Diff

@@ -2,14 +2,11 @@
 Copyright (c) 2021 David Renshaw. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: David Renshaw
-
-! This file was ported from Lean 3 source module imo.imo2011_q3
-! leanprover-community/mathlib commit 08b081ea92d80e3a41f899eea36ef6d56e0f1db0
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Data.Real.Basic
 
+#align_import imo.imo2011_q3 from "leanprover-community/mathlib"@"08b081ea92d80e3a41f899eea36ef6d56e0f1db0"
+
 /-!
 # IMO 2011 Q3

08b081ea

bump to nightly-2023-07-17-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/bf2428c9486c407ca38b5b3fb10b87dad0bc99fa

a159b65f

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: David Renshaw
 
 ! This file was ported from Lean 3 source module imo.imo2011_q3
-! leanprover-community/mathlib commit 5f25c089cb34db4db112556f23c50d12da81b297
+! leanprover-community/mathlib commit 08b081ea92d80e3a41f899eea36ef6d56e0f1db0
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -13,6 +13,9 @@ import Mathbin.Data.Real.Basic
 /-!
 # IMO 2011 Q3
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 Let f : ℝ → ℝ be a function that satisfies
 
    f(x + y) ≤ y * f(x) + f(f(x))

5f25c089

bump to nightly-2023-06-09-07

mathlib commit https://github.com/leanprover-community/mathlib/commit/7e5137f579de09a059a5ce98f364a04e221aabf0

16afdc39

Diff

@@ -35,7 +35,6 @@ theorem imo2011_q3 (f : ℝ → ℝ) (hf : ∀ x y, f (x + y) ≤ y * f x + f (f
       f t = f (x + (t - x)) := by rw [add_eq_of_eq_sub' rfl]
       _ ≤ (t - x) * f x + f (f x) := (hf x (t - x))
       _ = t * f x - x * f x + f (f x) := by rw [sub_mul]
-      
   have h_ab_combined : ∀ a b, a * f a + b * f b ≤ 2 * f a * f b :=
     by
     intro a b
@@ -58,7 +57,6 @@ theorem imo2011_q3 (f : ℝ → ℝ) (hf : ∀ x y, f (x + y) ≤ y * f x + f (f
       f (min 0 s - 1) ≤ (min 0 s - 1) * f x - x * f x + f (f x) := hxt x (min 0 s - 1)
       _ < s * f x - x * f x + f (f x) := by linarith [(mul_lt_mul_right hp).mpr hm]
       _ = 0 := by rw [(eq_div_iff hp.ne.symm).mp rfl]; linarith
-      
   have h_fx_zero_of_neg : ∀ x < 0, f x = 0 :=
     by
     intro x hxz

5f25c089

bump to nightly-2023-06-07-01

mathlib commit https://github.com/leanprover-community/mathlib/commit/a3209ddf94136d36e5e5c624b10b2a347cc9d090

176da745

Changes in mathlib4

mathlib3

mathlib4

5f25c089

chore: superfluous parentheses part 2 (#12131)

Co-authored-by: Moritz Firsching <firsching@google.com>

d48d30ac

Diff

@@ -28,7 +28,7 @@ theorem imo2011_q3 (f : ℝ → ℝ) (hf : ∀ x y, f (x + y) ≤ y * f x + f (f
   have hxt : ∀ x t, f t ≤ t * f x - x * f x + f (f x) := fun x t =>
     calc
       f t = f (x + (t - x)) := by rw [add_eq_of_eq_sub' rfl]
-      _ ≤ (t - x) * f x + f (f x) := (hf x (t - x))
+      _ ≤ (t - x) * f x + f (f x) := hf x (t - x)
       _ = t * f x - x * f x + f (f x) := by rw [sub_mul]
   have h_ab_combined : ∀ a b, a * f a + b * f b ≤ 2 * f a * f b := fun a b => by
     linarith [hxt b (f a), hxt a (f b)]

5f25c089

chore: remove stream-of-consciousness uses of have, replace and suffices (#10640)

No changes to tactic file, it's just boring fixes throughout the library.

This follows on from #6964.

Co-authored-by: sgouezel <sebastien.gouezel@univ-rennes1.fr> Co-authored-by: Eric Wieser <wieser.eric@gmail.com>

a13e8040

Diff

@@ -41,7 +41,7 @@ theorem imo2011_q3 (f : ℝ → ℝ) (hf : ∀ x y, f (x + y) ≤ y * f x + f (f
     let s := (x * f x - f (f x)) / f x
     have hm : min 0 s - 1 < s := (sub_one_lt _).trans_le (min_le_right 0 s)
     have hml : min 0 s - 1 < 0 := (sub_one_lt _).trans_le (min_le_left 0 s)
-    suffices : f (min 0 s - 1) < 0; exact not_le.mpr this (h_f_nonneg_of_pos (min 0 s - 1) hml)
+    suffices f (min 0 s - 1) < 0 from not_le.mpr this (h_f_nonneg_of_pos (min 0 s - 1) hml)
     have hp : 0 < f x := not_le.mp h_suppose_not
     calc
       f (min 0 s - 1) ≤ (min 0 s - 1) * f x - x * f x + f (f x) := hxt x (min 0 s - 1)

5f25c089

chore: split Data.Real.Basic (#8356)

Co-authored-by: Scott Morrison <scott.morrison@gmail.com>

43e32656

Diff

@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: David Renshaw
 -/
 import Mathlib.Data.Real.Basic
+import Mathlib.Tactic.Linarith
 
 #align_import imo.imo2011_q3 from "leanprover-community/mathlib"@"5f25c089cb34db4db112556f23c50d12da81b297"
 
@@ -57,4 +58,3 @@ theorem imo2011_q3 (f : ℝ → ℝ) (hf : ∀ x y, f (x + y) ≤ y * f x + f (f
     rw [hno] at hp
     linarith
 #align imo2011_q3 imo2011_q3
-

5f25c089

style: remove trailing whitespace and modify the linter to detect it (#6519)

ecc61a3b

Diff

@@ -54,7 +54,7 @@ theorem imo2011_q3 (f : ℝ → ℝ) (hf : ∀ x y, f (x + y) ≤ y * f x + f (f
   · suffices 0 ≤ f 0 from le_antisymm (h_f_nonpos 0) this
     have hno : f (-1) = 0 := h_fx_zero_of_neg (-1) neg_one_lt_zero
     have hp := hxt (-1) (-1)
-    rw [hno] at hp 
+    rw [hno] at hp
     linarith
 #align imo2011_q3 imo2011_q3

5f25c089

chore: script to replace headers with #align_import statements (#5979)

depends on: #5966

Co-authored-by: Eric Wieser <wieser.eric@gmail.com> Co-authored-by: Scott Morrison <scott.morrison@gmail.com>

89aa3a3b

Diff

@@ -2,14 +2,11 @@
 Copyright (c) 2021 David Renshaw. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: David Renshaw
-
-! This file was ported from Lean 3 source module imo.imo2011_q3
-! leanprover-community/mathlib commit 5f25c089cb34db4db112556f23c50d12da81b297
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Data.Real.Basic
 
+#align_import imo.imo2011_q3 from "leanprover-community/mathlib"@"5f25c089cb34db4db112556f23c50d12da81b297"
+
 /-!
 # IMO 2011 Q3

5f25c089

feat: port Algebra.ContinuedFractions.Computation.Approximations (#3917)

Co-authored-by: int-y1 <jason_yuen2007@hotmail.com> Co-authored-by: Moritz Firsching <firsching@google.com>

33fd7e14

`imo.imo2011_q3` ⟷ `Archive.Imo.Imo2011Q3`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 3 + 202

imo.imo2011_q3 ⟷ Archive.Imo.Imo2011Q3

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 3 + 202

`imo.imo2011_q3` ⟷ `Archive.Imo.Imo2011Q3`