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Related theorems Unicode version |
| Description: A point belonging to a set's closure but not the set itself is a limit point. |
| Ref | Expression |
|---|---|
| lpfval.1 |
|
| Ref | Expression |
|---|---|
| islpi |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lpfval.1 |
. . . . . 6
| |
| 2 | 1 | clslp 7727 |
. . . . 5
|
| 3 | 2 | eleq2d 1540 |
. . . 4
|
| 4 | elun 2171 |
. . . . 5
| |
| 5 | df-or 224 |
. . . . 5
| |
| 6 | 4, 5 | bitr 173 |
. . . 4
|
| 7 | 3, 6 | syl6bb 535 |
. . 3
|
| 8 | 7 | biimpd 153 |
. 2
|
| 9 | 8 | imp32 363 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: metelcls 7948 |
| 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 1210 ax-11o 1218 ax-ext 1459 ax-rep 2690 ax-sep 2700 ax-pow 2739 ax-pr 2776 ax-un 2863 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 776 df-ex 980 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1586 df-ral 1648 df-rex 1649 df-rab 1651 df-v 1810 df-sbc 1940 df-csb 2000 df-dif 2047 df-un 2048 df-in 2049 df-ss 2051 df-nul 2279 df-pw 2400 df-sn 2410 df-pr 2411 df-op 2414 df-uni 2501 df-int 2531 df-iun 2565 df-iin 2566 df-br 2617 df-opab 2664 df-id 2832 df-xp 3181 df-rel 3182 df-cnv 3183 df-co 3184 df-dm 3185 df-rn 3186 df-res 3187 df-ima 3188 df-fun 3189 df-fn 3190 df-fv 3195 df-top 7571 df-cld 7642 df-ntr 7643 df-cls 7644 df-nei 7692 df-lp 7720 |