Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > xnegmnf | Unicode version |
Description: Minus . Remark of [BourbakiTop1] p. IV.15. (Contributed by FL, 26-Dec-2011.) (Revised by Mario Carneiro, 20-Aug-2015.) |
Ref | Expression |
---|---|
xnegmnf |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-xneg 9552 | . 2 | |
2 | mnfnepnf 7814 | . . 3 | |
3 | ifnefalse 3480 | . . 3 | |
4 | 2, 3 | ax-mp 5 | . 2 |
5 | eqid 2137 | . . 3 | |
6 | 5 | iftruei 3475 | . 2 |
7 | 1, 4, 6 | 3eqtri 2162 | 1 |
Colors of variables: wff set class |
Syntax hints: wceq 1331 wne 2306 cif 3469 cpnf 7790 cmnf 7791 cneg 7927 cxne 9549 |
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-pow 4093 ax-un 4350 ax-cnex 7704 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ne 2307 df-nel 2402 df-rex 2420 df-rab 2423 df-v 2683 df-un 3070 df-in 3072 df-ss 3079 df-if 3470 df-pw 3507 df-sn 3528 df-pr 3529 df-uni 3732 df-pnf 7795 df-mnf 7796 df-xr 7797 df-xneg 9552 |
This theorem is referenced by: xnegcl 9608 xnegneg 9609 xltnegi 9611 xnegid 9635 xnegdi 9644 xsubge0 9657 xposdif 9658 |
Copyright terms: Public domain | W3C validator |