New Foundations Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > NFE Home > Th. List > idkex | GIF version |
Description: The Kuratowski identity relationship is a set. (Contributed by SF, 14-Jan-2015.) |
Ref | Expression |
---|---|
idkex | ⊢ Ik ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfidk2 4314 | . 2 ⊢ Ik = ( Sk ∩ ◡k Sk ) | |
2 | ssetkex 4295 | . . 3 ⊢ Sk ∈ V | |
3 | 2 | cnvkex 4288 | . . 3 ⊢ ◡k Sk ∈ V |
4 | 2, 3 | inex 4106 | . 2 ⊢ ( Sk ∩ ◡k Sk ) ∈ V |
5 | 1, 4 | eqeltri 2423 | 1 ⊢ Ik ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1710 Vcvv 2860 ∩ cin 3209 ◡kccnvk 4176 Sk cssetk 4184 Ik cidk 4185 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 ax-nin 4079 ax-xp 4080 ax-cnv 4081 ax-sset 4083 ax-sn 4088 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-3an 936 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2479 df-ne 2519 df-ral 2620 df-rex 2621 df-v 2862 df-nin 3212 df-compl 3213 df-in 3214 df-un 3215 df-dif 3216 df-ss 3260 df-nul 3552 df-sn 3742 df-pr 3743 df-opk 4059 df-xpk 4186 df-cnvk 4187 df-ssetk 4194 df-idk 4196 |
This theorem is referenced by: nnsucelrlem1 4425 nndisjeq 4430 tfinrelkex 4488 oddfinex 4505 evenodddisjlem1 4516 phiexg 4572 opexg 4588 proj1exg 4592 proj2exg 4593 setconslem5 4736 1stex 4740 swapex 4743 |
Copyright terms: Public domain | W3C validator |