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| Description: A continuous function is continuous at all points. Theorem 7.2(g) of [Munkres] p. 107. |
| Ref | Expression |
|---|---|
| cncnp.1 |
|
| cncnp.2 |
|
| Ref | Expression |
|---|---|
| cncnp |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cncnp.1 |
. . . . . . . 8
| |
| 2 | cncnp.2 |
. . . . . . . 8
| |
| 3 | 1, 2 | cnsscnp 7772 |
. . . . . . 7
|
| 4 | 3 | sseld 2067 |
. . . . . 6
|
| 5 | 4 | 3expia 835 |
. . . . 5
|
| 6 | 5 | com23 32 |
. . . 4
|
| 7 | 6 | r19.21adv 1718 |
. . 3
|
| 8 | 7 | 3adant3 799 |
. 2
|
| 9 | pm3.27 323 |
. . . . . . . 8
| |
| 10 | 9 | r19.20si 1706 |
. . . . . . 7
|
| 11 | 10 | anim2i 335 |
. . . . . 6
|
| 12 | 11 | ex 373 |
. . . . 5
|
| 13 | 1 | cncnplem4 7777 |
. . . . . . . . . . 11
|
| 14 | 13 | exp3a 375 |
. . . . . . . . . 10
|
| 15 | 14 | imp 350 |
. . . . . . . . 9
|
| 16 | 15 | r19.20sdv 1710 |
. . . . . . . 8
|
| 17 | 16 | ex 373 |
. . . . . . 7
|
| 18 | 17 | imdistand 445 |
. . . . . 6
|
| 19 | ralcom 1774 |
. . . . . . 7
| |
| 20 | 19 | anbi2i 480 |
. . . . . 6
|
| 21 | 18, 20 | syl5ib 206 |
. . . . 5
|
| 22 | 12, 21 | sylan9r 469 |
. . . 4
|
| 23 | 22 | 3adant2 798 |
. . 3
|
| 24 | 1, 2 | iscnp 7760 |
. . . . . . 7
|
| 25 | 24 | 3expa 833 |
. . . . . 6
|
| 26 | 25 | ralbidva 1659 |
. . . . 5
|
| 27 | 1, 2 | iscn 7758 |
. . . . 5
|
| 28 | 26, 27 | imbi12d 626 |
. . . 4
|
| 29 | 28 | 3adant3 799 |
. . 3
|
| 30 | 23, 29 | mpbird 196 |
. 2
|
| 31 | 8, 30 | impbid 516 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: cncnp2 7779 metcn 7889 metcn4 7971 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-9 965 ax-10 966 ax-11 967 ax-12 968 ax-13 969 ax-14 970 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-rep 2693 ax-sep 2703 ax-pow 2742 ax-pr 2779 ax-un 2866 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 777 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 df-ral 1649 df-rex 1650 df-rab 1652 df-v 1812 df-sbc 1942 df-csb 2002 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-pw 2402 df-sn 2412 df-pr 2413 df-op 2416 df-uni 2504 df-iun 2568 df-br 2620 df-opab 2667 df-id 2835 df-xp 3184 df-rel 3185 df-cnv 3186 df-co 3187 df-dm 3188 df-rn 3189 df-res 3190 df-ima 3191 df-fun 3192 df-fn 3193 df-f 3194 df-fv 3198 df-opr 3965 df-oprab 3966 df-map 4324 df-top 7592 df-cn 7754 df-cnp 7755 |