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| Description: A contradiction implies anything. Deduction from pm2.21 76. |
| Ref | Expression |
|---|---|
| pm2.21d.1 |
|
| Ref | Expression |
|---|---|
| pm2.21d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pm2.21d.1 |
. . 3
| |
| 2 | 1 | a1d 12 |
. 2
|
| 3 | 2 | a3d 75 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: pm2.5 100 pm5.14 663 bianfd 736 a12stdy4 1368 sbc2or 1948 opth2 2789 findsg 3147 tfindsg 3152 funopg 3533 ensdomtr 4451 sdomen2 4462 suc11reg 4577 axunndlem1 4919 axunnd 4920 axpownd 4925 axregndlem1 4926 axregndlem2 4927 axinfndlem1 4929 axinfnd 4930 axacndlem1 4931 axacndlem2 4932 axacndlem3 4933 axacndlem4 4934 axacndlem5 4935 axacnd 4936 ltapr 5123 xrltnsymt 5523 xrlttrt 5526 add20 5576 prodgt0 5775 squeeze0 5872 nnleltp1t 5901 xrsupsslem 6023 xrinfmsslem 6024 xrub 6027 supxrre 6030 xrsup0 6044 elnnz 6092 qbtwnxr 6217 abssubne0t 6820 facdivt 6879 bccl2t 6909 climcl 6916 clmi1 7024 0top 7577 metxp 7774 tgioolem 7853 bcthlem18 7950 efif1lem7 8651 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |