Joshua Potter
7fe780e72f
Drop `Common.Set.Interval` and `Common.Set.Partition`.
2023-07-25 07:28:20 -06:00
Joshua Potter
f328440797
Enderton. Peano systems.
2023-07-21 14:25:36 -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
8b5736397c
Enderton. Break out relations/ordered pairs. Exercise 6.7.
2023-06-20 15:02:09 -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
49bd4871fe
Enderton. Theorem 3A.
2023-06-06 20:16:06 -06:00
Joshua Potter
96dd9b5669
Revise geometry with different types of rectangles and lines.
2023-05-15 06:40:35 -06:00
Joshua Potter
f5dfb9ff6b
Generalize concept of partitions and step functions.
2023-05-12 13:17:34 -06:00
Joshua Potter
60724c0b52
Generalize set functions and move partitions in anticipation
...
of Apostol 1.11 exercise 8.
2023-05-12 07:05:31 -06:00
Joshua Potter