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| Description: A contraposition inference. |
| Ref | Expression |
|---|---|
| con3.a |
|
| Ref | Expression |
|---|---|
| con3i |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | notnot2 100 |
. . 3
| |
| 2 | con3.a |
. . 3
| |
| 3 | 1, 2 | syl 12 |
. 2
|
| 4 | 3 | con1i 112 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: pm2.5 115 pm2.51 116 pm2.52 117 mto 121 nsyl 131 notbii 204 pm2.45 299 pm2.46 300 orim12i 363 pm5.14 728 pm5.21ni 742 con3th 843 equidqe 1314 equidq 1315 ax4 1318 ax67 1367 ax67to6 1368 ax467to6 1372 19.29OLD 1422 sbn 1601 ax11indalem 1759 a12lem2 1768 euor2 1839 moexex 1841 necon3aiOLD 2044 necon3biOLD 2046 necon1bi 2048 sbc2or 2481 difrab 2868 noel 2879 ifor 3008 snex 3492 mosubopt 3551 eldifpw 3854 nlimsucg 3923 nlimsucgOLD 3924 tfindsg 3944 findsg 3980 vtoclibr 4035 soirri 4314 nfvres 4705 fvopab4ndm 4747 fvopabn 4749 oprprc1 4908 ndmoprass 4981 ndmoprdistr 4982 curry1val 5077 curry2val 5080 canth 5112 eceqopreq 5372 fiprc 5492 ensdomtr 5534 sdomirr 5535 sdomen2 5545 pwuninel 5550 2pwuninel 5551 en2lp 5707 isfinite 5741 nnsdom 5742 rankxplim3 5825 rankxpsuc 5826 ac6n 5919 ac9s 5926 kmlem2 5928 alephnbtwn 6016 alephnbtwn2 6017 alephval2 6050 dominf 6052 cdainf 6087 nd3 6092 axrepnd 6098 nlt1pi 6185 lt1nnn 7130 zeo 7411 uzssz 7599 sumsqne0i 7879 nnesqi 7912 climcl 8238 clmi1i 8346 ruclem28 8806 grpidval 9342 issubg 9425 avril1 10142 nonbooli 11231 chpssati 11935 bnj1144 12941 ressn0 13829 distel 13870 predpoirr 13908 predfrirr 13909 rb-ax2 14220 rb-ax4 14222 nandsym1 14246 evpexun 14322 fiiu 14344 neiopne 14354 isfinite1b 14434 hmeogrp 14892 fgsb 14921 fgsb2 14925 cnfilca 14927 rcfpfillem2 14929 difxp 15690 frinfm 15758 heiborlem39 15993 pm10.251 16306 ax4567to6 16362 en3lpVD 16669 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |