New Foundations Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > NFE Home > Th. List > xpvv | GIF version |
Description: The cross product of the universe with itself is the universe. (Contributed by Scott Fenton, 14-Apr-2021.) |
Ref | Expression |
---|---|
xpvv | ⊢ (V × V) = V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqv 3566 | . 2 ⊢ ((V × V) = V ↔ ∀x x ∈ (V × V)) | |
2 | opeq 4620 | . . 3 ⊢ x = 〈 Proj1 x, Proj2 x〉 | |
3 | vex 2863 | . . . . 5 ⊢ x ∈ V | |
4 | 3 | proj1ex 4594 | . . . 4 ⊢ Proj1 x ∈ V |
5 | 3 | proj2ex 4595 | . . . 4 ⊢ Proj2 x ∈ V |
6 | opelxp 4812 | . . . 4 ⊢ (〈 Proj1 x, Proj2 x〉 ∈ (V × V) ↔ ( Proj1 x ∈ V ∧ Proj2 x ∈ V)) | |
7 | 4, 5, 6 | mpbir2an 886 | . . 3 ⊢ 〈 Proj1 x, Proj2 x〉 ∈ (V × V) |
8 | 2, 7 | eqeltri 2423 | . 2 ⊢ x ∈ (V × V) |
9 | 1, 8 | mpgbir 1550 | 1 ⊢ (V × V) = V |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1642 ∈ wcel 1710 Vcvv 2860 〈cop 4562 Proj1 cproj1 4564 Proj2 cproj2 4565 × cxp 4771 |
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-13 1712 ax-14 1714 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-1c 4082 ax-sset 4083 ax-si 4084 ax-ins2 4085 ax-ins3 4086 ax-typlower 4087 ax-sn 4088 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-3or 935 df-3an 936 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-eu 2208 df-mo 2209 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2479 df-ne 2519 df-ral 2620 df-rex 2621 df-reu 2622 df-rmo 2623 df-rab 2624 df-v 2862 df-sbc 3048 df-nin 3212 df-compl 3213 df-in 3214 df-un 3215 df-dif 3216 df-symdif 3217 df-ss 3260 df-pss 3262 df-nul 3552 df-if 3664 df-pw 3725 df-sn 3742 df-pr 3743 df-uni 3893 df-int 3928 df-opk 4059 df-1c 4137 df-pw1 4138 df-uni1 4139 df-xpk 4186 df-cnvk 4187 df-ins2k 4188 df-ins3k 4189 df-imak 4190 df-cok 4191 df-p6 4192 df-sik 4193 df-ssetk 4194 df-imagek 4195 df-idk 4196 df-iota 4340 df-0c 4378 df-addc 4379 df-nnc 4380 df-fin 4381 df-lefin 4441 df-ltfin 4442 df-ncfin 4443 df-tfin 4444 df-evenfin 4445 df-oddfin 4446 df-sfin 4447 df-spfin 4448 df-phi 4566 df-op 4567 df-proj1 4568 df-proj2 4569 df-opab 4624 df-xp 4785 |
This theorem is referenced by: fncup 5814 composefn 5819 addcfn 5826 fncross 5847 fnmap 6008 fnpm 6009 vvsqenvv 6258 |
Copyright terms: Public domain | W3C validator |