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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 pm5.14 663 pm5.21ni 676 con3th 764 ax4 969 ax67 1016 ax67to6 1017 ax467to6 1021 19.29 1067 sbn 1226 ax11indalem 1361 a12lem2 1370 moexex 1431 necon3ai 1598 necon3bi 1599 sbc2or 1948 difrab 2263 noel 2274 mosubopt 2793 eldifpw 2900 nlimsucg 3102 findsg 3147 tfindsg 3152 vtoclibr 3203 soirri 3428 nfvres 3733 fvopab4ndm 3769 fvopabn 3771 canth 3892 oprprc1 3969 ndmoprass 4034 ndmoprdistr 4035 curry1val 4084 eceqopreq 4297 ensdomtr 4451 sdomirr 4452 sdomen2 4462 en2lp 4574 isfinite 4606 nnsdom 4607 rankxplim3 4686 rankxpsuc 4687 ac6n 4729 ac9s 4736 kmlem2 4738 alephnbtwn 4840 alephnbtwn2 4841 alephval2 4874 dominf 4876 cdainf 4909 nd3 4912 axrepnd 4918 nlt1pi 5005 lt1nnn 5895 zeot 6146 uzssz 6362 sumsqne0 6565 nnesq 6592 climcl 6916 clmi1 7024 ruclem28 7480 issubg 8053 avril1 8723 nonbool 9513 chpssat 10198 fiiu 10350 neiopne 10369 hmeogrp 10425 fgsb 10444 fgsb2 10449 cnfilca 10451 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |