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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 pm5.14 667 bianfd 740 a12stdy4 1377 sbc2or 1961 opth2 2806 findsg 3163 tfindsg 3168 funopg 3553 ensdomtr 4477 sdomen2 4488 suc11reg 4614 axunndlem1 4959 axunnd 4960 axpownd 4965 axregndlem1 4966 axregndlem2 4967 axinfndlem1 4969 axinfnd 4970 axacndlem1 4971 axacndlem2 4972 axacndlem3 4973 axacndlem4 4974 axacndlem5 4975 axacnd 4976 ltapr 5163 xrltnsymt 5562 xrlttrt 5565 add20 5614 prodgt0 5821 squeeze0 5926 nnleltp1t 5956 xrsupsslem 6078 xrinfmsslem 6079 xrub 6082 supxrre 6085 xrsup0 6099 elnnz 6147 qbtwnxr 6280 eliooret 6387 abssubne0t 6882 facdivt 6942 bccl2t 6971 climcl 6978 clmi1 7086 0top 7634 metxp 7831 tgioolem 7911 bcthlem18 8013 efif1lem7 8731 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |