Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > brtpos0 | Unicode version |
Description: The behavior of tpos when the left argument is the empty set (which is not an ordered pair but is the "default" value of an ordered pair when the arguments are proper classes). (Contributed by Mario Carneiro, 10-Sep-2015.) |
Ref | Expression |
---|---|
brtpos0 | tpos |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | brtpos2 6141 | . 2 tpos | |
2 | ssun2 3235 | . . . . 5 | |
3 | 0ex 4050 | . . . . . 6 | |
4 | 3 | snid 3551 | . . . . 5 |
5 | 2, 4 | sselii 3089 | . . . 4 |
6 | 5 | biantrur 301 | . . 3 |
7 | cnvsn0 5002 | . . . . . 6 | |
8 | 7 | unieqi 3741 | . . . . 5 |
9 | uni0 3758 | . . . . 5 | |
10 | 8, 9 | eqtri 2158 | . . . 4 |
11 | 10 | breq1i 3931 | . . 3 |
12 | 6, 11 | bitr3i 185 | . 2 |
13 | 1, 12 | syl6bb 195 | 1 tpos |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wcel 1480 cun 3064 c0 3358 csn 3522 cuni 3731 class class class wbr 3924 ccnv 4533 cdm 4534 tpos ctpos 6134 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-nul 4049 ax-pow 4093 ax-pr 4126 ax-un 4350 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ne 2307 df-ral 2419 df-rex 2420 df-rab 2423 df-v 2683 df-sbc 2905 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-nul 3359 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-br 3925 df-opab 3985 df-mpt 3986 df-id 4210 df-xp 4540 df-rel 4541 df-cnv 4542 df-co 4543 df-dm 4544 df-rn 4545 df-res 4546 df-ima 4547 df-iota 5083 df-fun 5120 df-fn 5121 df-fv 5126 df-tpos 6135 |
This theorem is referenced by: reldmtpos 6143 tpostpos 6154 |
Copyright terms: Public domain | W3C validator |