Joshua Potter
e8aa984b98
Add icon to distinguish Lean definitions from custom ones.
...
Update to pending any proofs that were using already defined Lean
proofs.
2023-08-08 20:50:31 -06:00
Joshua Potter
77684120d9
Enderton. Prove ordering theorems and fix injective successor proof.
2023-08-04 18:26:15 -06:00
Joshua Potter
5dfb2f12cf
Enderton. Finish ordering on natural numbers exercises.
2023-08-04 09:44:58 -06:00
Joshua Potter
9b8ddd2b0d
Enderton. Begin progressing through natural numbers.
2023-07-19 19:25:44 -06:00
Joshua Potter
4679b66abe
Enderton. Finish ordering relation exercises/theorems.
2023-07-18 16:34:06 -06:00
Joshua Potter
668c005c91
Enderton. Ordering relations exercises.
2023-07-14 15:09:33 -06:00
Joshua Potter
c07be8a4ce
Enderton. Finish most equivalence class exercises.
2023-07-13 13:06:48 -06:00
Joshua Potter
5991554fcb
Enderton. Exercise 3.38.
2023-07-11 16:48:46 -06:00
Joshua Potter
2199503f70
Enderton. Fixup equivalence class def'ns and additional exercises.
2023-07-11 13:15:45 -06:00
Joshua Potter
98ecc12995
Enderton. Additional equivalence relation exercises.
2023-07-10 14:47:27 -06:00
Joshua Potter
c574b481af
Enderton. Exercise 3.29.
2023-07-07 20:30:53 -06:00
Joshua Potter
04fe6c66db
Enderton. Heterogeneous relations and additional exercises.
2023-07-07 10:56:47 -06:00
Joshua Potter
1c6fec389f
Enderton. Exercises 3.19-3.23.
2023-07-06 15:31:09 -06:00
Joshua Potter
874bbe203c
Enderton. Exercise 3.19.
2023-07-06 07:31:13 -06:00
Joshua Potter
0e55484adc
Enderton. Exercises 3.16 - 3.18.
2023-07-05 17:02:43 -06:00
Joshua Potter
d3f242cf07
Enderton. Formally verify exercises 3.12 through 3.15.
2023-07-05 12:45:51 -06:00
Joshua Potter
993e9fe981
Enderton. Exercise 3.31, Theorem 3K, and corollary.
2023-07-04 16:35:21 -06:00
Joshua Potter
86abd77523
Enderton. Lean references of definitions and more exercises.
2023-07-03 15:48:28 -06:00
Joshua Potter
140195a8ee
Enderton. Add equivalence relation problem prompts.
2023-07-02 12:26:09 -06:00
Joshua Potter
8294d9583c
Enderton. Prove out most of the set function exercises.
2023-07-01 14:40:11 -06:00
Joshua Potter
63667c22e4
Normalize header sizes.
2023-06-29 17:02:20 -06:00
Joshua Potter
e869d6f2d3
Move aviary into Smullyan directory.
2023-06-29 15:30:48 -06:00
Joshua Potter
dd4340c4bd
Move `OrderedPair` and `Relation` to Enderton.
...
These modules probably won't be very useful in general; there exist
better representations in Lean when dealing with ordered pairs or
relations already.
2023-06-29 15:25:59 -06:00
Joshua Potter
c65e28888d
Enderton. Fix exercise names.
2023-06-29 14:53:36 -06:00
Joshua Potter
644660d197
Enderton. Verify theorem 3I.
2023-06-26 15:11:19 -06:00
Joshua Potter
9b6af648f2
Enderton. Theorem 3H and helper theorems.
2023-06-26 13:11:55 -06:00
Joshua Potter
931e617161
Enderton. Formally verify theorem 3G.
2023-06-26 07:08:25 -06:00
Joshua Potter
a6e6251627
Enderton. Continue through theorem 3 set.
2023-06-25 07:27:35 -06:00
Joshua Potter
27372eb160
Enderton. Add additional definitions and prove Theorem 3E.
2023-06-23 15:47:55 -06:00
Joshua Potter
3d556bc613
Enderton. Finish exercises 6.
2023-06-22 14:34:50 -06:00
Joshua Potter
8b5736397c
Enderton. Break out relations/ordered pairs. Exercise 6.7.
2023-06-20 15:02:09 -06:00
Joshua Potter
738435e299
Add prompts for upcoming theorems/exercises.
2023-06-16 08:16:33 -06:00
Joshua Potter
2abd4b6b25
Enderton. Finishe exercise set 5. Prep for exercise set 6.
2023-06-15 15:31:58 -06:00
Joshua Potter
f5d1fc546a
Enderton. Move Kuratowski's definition of an ordered pair into chapter; not
...
likely to be used outside this book.
2023-06-10 16:02:22 -06:00
Joshua Potter
6d3a2d8ad0
Fix build errors in `Chapter_2.lean`.
2023-06-10 12:09:24 -06:00
Joshua Potter
64d8324657
Enderton. Finish exercises 5 in LaTeX.
2023-06-10 05:51:42 -06:00
Joshua Potter
ad3e31764b
Enderton. Exercise 5.(1|2a|2b).
2023-06-09 21:03:06 -06:00
Joshua Potter
7559664d56
Enderton. Ordered pairs.
2023-06-08 17:57:02 -06:00
Joshua Potter
49bd4871fe
Enderton. Theorem 3A.
2023-06-06 20:16:06 -06:00
Joshua Potter
2dff3f5794
Enderton. Chapter 2 exercises, 11-25.
2023-06-04 17:34:42 -06:00
Joshua Potter
4624d58924
Enderton. Continue proofs/exercises of "Axioms and Operations."
2023-05-23 15:38:33 -06:00
Joshua Potter
fd816a97bc
Enderton "Algebra of Sets" identities and create `Chapter_2.lean`.
2023-05-23 09:18:23 -06:00
Joshua Potter
8279131d74
Enderton, basic axioms/unions exercises.
2023-05-21 18:32:59 -06:00
Joshua Potter
1da6e31581
Enderton exercises 2.
2023-05-19 09:25:37 -06:00
Joshua Potter
ead87350b8
Enderton, Baby Set Theory.
2023-05-18 16:02:15 -06:00
Joshua Potter
ed981c3892
Add start of Enderton's "Elements of Set Theory."
2023-05-18 14:04:59 -06:00
Joshua Potter