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| Description: A contraposition inference. |
| Ref | Expression |
|---|---|
| con3.a |
|
| Ref | Expression |
|---|---|
| con3i |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nega 84 |
. . 3
| |
| 2 | con3.a |
. . 3
| |
| 3 | 1, 2 | syl 10 |
. 2
|
| 4 | 3 | con1i 96 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: pm2.5 100 pm2.51 101 pm2.52 102 mto 106 nsyl 116 negbii 187 pm2.45 277 pm2.46 278 orim12i 336 pm5.14 665 pm5.21ni 678 con3th 766 ax4 972 ax67 1020 ax67to6 1021 ax467to6 1025 19.29 1071 sbn 1231 ax11indalem 1368 a12lem2 1377 moexex 1438 necon3ai 1606 necon3bi 1607 sbc2or 1958 difrab 2273 noel 2284 mosubopt 2804 eldifpw 2910 nlimsucg 3112 findsg 3157 tfindsg 3162 vtoclibr 3213 soirri 3442 nfvres 3748 fvopab4ndm 3784 fvopabn 3786 canth 3907 oprprc1 3984 ndmoprass 4048 ndmoprdistr 4049 curry1val 4100 eceqopreq 4313 ensdomtr 4471 sdomirr 4472 sdomen2 4482 pwuninel 4486 2pwuninel 4487 en2lp 4602 isfiniteOLD 4634 nnsdom 4635 rankxplim3 4714 rankxpsuc 4715 ac6n 4757 ac9s 4764 kmlem2 4766 alephnbtwn 4868 alephnbtwn2 4869 alephval2 4902 dominf 4904 cdainf 4937 nd3 4940 axrepnd 4946 nlt1pi 5033 lt1nnn 5947 zeot 6199 uzssz 6430 sumsqne0 6634 nnesq 6662 climcl 6978 clmi1 7086 ruclem28 7537 issubg 8116 avril1 8784 nonbool 9596 chpssat 10290 fiiu 10453 fiiuOLD 10454 neiopne 10474 hmeogrp 10538 fgsb 10570 fgsbOLD 10571 fgsb2 10580 cnfilca 10583 cnfilcaOLD 10584 rcfpfillem2 10587 rcfpfillem2OLD 10588 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |