Mathbox for Glauco Siliprandi |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > Mathboxes > 0cnf | Structured version Visualization version GIF version |
Description: The empty set is a continuous function. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
Ref | Expression |
---|---|
0cnf | ⊢ ∅ ∈ ({∅} Cn {∅}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f0 6560 | . 2 ⊢ ∅:∅⟶∅ | |
2 | cnv0 5999 | . . . . . 6 ⊢ ◡∅ = ∅ | |
3 | 2 | imaeq1i 5926 | . . . . 5 ⊢ (◡∅ “ 𝑥) = (∅ “ 𝑥) |
4 | 0ima 5946 | . . . . 5 ⊢ (∅ “ 𝑥) = ∅ | |
5 | 3, 4 | eqtri 2844 | . . . 4 ⊢ (◡∅ “ 𝑥) = ∅ |
6 | 0ex 5211 | . . . . 5 ⊢ ∅ ∈ V | |
7 | 6 | snid 4601 | . . . 4 ⊢ ∅ ∈ {∅} |
8 | 5, 7 | eqeltri 2909 | . . 3 ⊢ (◡∅ “ 𝑥) ∈ {∅} |
9 | 8 | rgenw 3150 | . 2 ⊢ ∀𝑥 ∈ {∅} (◡∅ “ 𝑥) ∈ {∅} |
10 | sn0topon 21606 | . . 3 ⊢ {∅} ∈ (TopOn‘∅) | |
11 | iscn 21843 | . . 3 ⊢ (({∅} ∈ (TopOn‘∅) ∧ {∅} ∈ (TopOn‘∅)) → (∅ ∈ ({∅} Cn {∅}) ↔ (∅:∅⟶∅ ∧ ∀𝑥 ∈ {∅} (◡∅ “ 𝑥) ∈ {∅}))) | |
12 | 10, 10, 11 | mp2an 690 | . 2 ⊢ (∅ ∈ ({∅} Cn {∅}) ↔ (∅:∅⟶∅ ∧ ∀𝑥 ∈ {∅} (◡∅ “ 𝑥) ∈ {∅})) |
13 | 1, 9, 12 | mpbir2an 709 | 1 ⊢ ∅ ∈ ({∅} Cn {∅}) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 208 ∧ wa 398 ∈ wcel 2114 ∀wral 3138 ∅c0 4291 {csn 4567 ◡ccnv 5554 “ cima 5558 ⟶wf 6351 ‘cfv 6355 (class class class)co 7156 TopOnctopon 21518 Cn ccn 21832 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-mpt 5147 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-fv 6363 df-ov 7159 df-oprab 7160 df-mpo 7161 df-map 8408 df-top 21502 df-topon 21519 df-cn 21835 |
This theorem is referenced by: cncfiooicc 42197 |
Copyright terms: Public domain | W3C validator |