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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 7732 |
. . . . . . 7
|
| 4 | 3 | sseld 2064 |
. . . . . 6
|
| 5 | 4 | 3expia 834 |
. . . . 5
|
| 6 | 5 | com23 32 |
. . . 4
|
| 7 | 6 | r19.21adv 1716 |
. . 3
|
| 8 | 7 | 3adant3 798 |
. 2
|
| 9 | pm3.27 323 |
. . . . . . . 8
| |
| 10 | 9 | r19.20si 1704 |
. . . . . . 7
|
| 11 | 10 | anim2i 335 |
. . . . . 6
|
| 12 | 11 | ex 373 |
. . . . 5
|
| 13 | 1 | cncnplem4 7737 |
. . . . . . . . . . 11
|
| 14 | 13 | exp3a 375 |
. . . . . . . . . 10
|
| 15 | 14 | imp 350 |
. . . . . . . . 9
|
| 16 | 15 | r19.20sdv 1708 |
. . . . . . . 8
|
| 17 | 16 | ex 373 |
. . . . . . 7
|
| 18 | 17 | imdistand 445 |
. . . . . 6
|
| 19 | ralcom 1772 |
. . . . . . 7
| |
| 20 | 19 | anbi2i 480 |
. . . . . 6
|
| 21 | 18, 20 | syl5ib 206 |
. . . . 5
|
| 22 | 12, 21 | sylan9r 469 |
. . . 4
|
| 23 | 22 | 3adant2 797 |
. . 3
|
| 24 | 1, 2 | iscnp 7720 |
. . . . . . 7
|
| 25 | 24 | 3expa 832 |
. . . . . 6
|
| 26 | 25 | ralbidva 1657 |
. . . . 5
|
| 27 | 1, 2 | iscn 7718 |
. . . . 5
|
| 28 | 26, 27 | imbi12d 625 |
. . . 4
|
| 29 | 28 | 3adant3 798 |
. . 3
|
| 30 | 23, 29 | mpbird 196 |
. 2
|
| 31 | 8, 30 | impbid 515 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: cncnp2 7739 metcn 7851 metcn4 7933 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-9 964 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1209 ax-11o 1217 ax-ext 1458 ax-rep 2689 ax-sep 2699 ax-pow 2738 ax-pr 2775 ax-un 2862 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 776 df-ex 980 df-sb 1171 df-eu 1381 df-mo 1382 df-clab 1463 df-cleq 1468 df-clel 1471 df-ne 1585 df-ral 1647 df-rex 1648 df-rab 1650 df-v 1809 df-sbc 1939 df-csb 1999 df-dif 2046 df-un 2047 df-in 2048 df-ss 2050 df-nul 2278 df-pw 2399 df-sn 2409 df-pr 2410 df-op 2413 df-uni 2500 df-iun 2564 df-br 2616 df-opab 2663 df-id 2831 df-xp 3180 df-rel 3181 df-cnv 3182 df-co 3183 df-dm 3184 df-rn 3185 df-res 3186 df-ima 3187 df-fun 3188 df-fn 3189 df-f 3190 df-fv 3194 df-opr 3960 df-oprab 3961 df-map 4317 df-top 7552 df-cn 7714 df-cnp 7715 |