Theorem cnpf 22677

Description: A continuous function at point 𝑃 is a mapping. (Contributed by FL, 17-Nov-2006.) (Revised by Mario Carneiro, 21-Aug-2015.)

Hypotheses

Ref	Expression
iscnp2.1	⊢ 𝑋 = ∪ 𝐽
iscnp2.2	⊢ 𝑌 = ∪ 𝐾

Assertion

Ref	Expression
cnpf	⊢ (𝐹 ∈ ((𝐽 CnP 𝐾)‘𝑃) → 𝐹:𝑋⟶𝑌)

Proof of Theorem cnpf

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		iscnp2.1	. . . 4 ⊢ 𝑋 = ∪ 𝐽
2		iscnp2.2	. . . 4 ⊢ 𝑌 = ∪ 𝐾
3	1, 2	iscnp2 22669	. . 3 ⊢ (𝐹 ∈ ((𝐽 CnP 𝐾)‘𝑃) ↔ ((𝐽 ∈ Top ∧ 𝐾 ∈ Top ∧ 𝑃 ∈ 𝑋) ∧ (𝐹:𝑋⟶𝑌 ∧ ∀𝑦 ∈ 𝐾 ((𝐹‘𝑃) ∈ 𝑦 → ∃𝑥 ∈ 𝐽 (𝑃 ∈ 𝑥 ∧ (𝐹 “ 𝑥) ⊆ 𝑦)))))
4	3	simprbi 497	. 2 ⊢ (𝐹 ∈ ((𝐽 CnP 𝐾)‘𝑃) → (𝐹:𝑋⟶𝑌 ∧ ∀𝑦 ∈ 𝐾 ((𝐹‘𝑃) ∈ 𝑦 → ∃𝑥 ∈ 𝐽 (𝑃 ∈ 𝑥 ∧ (𝐹 “ 𝑥) ⊆ 𝑦))))
5	4	simpld 495	1 ⊢ (𝐹 ∈ ((𝐽 CnP 𝐾)‘𝑃) → 𝐹:𝑋⟶𝑌)

Syntax hints:   → wi 4   ∧ wa 396   ∧ w3a 1087   = wceq 1541   ∈ wcel 2106  ∀wral 3060  ∃wrex 3069   ⊆ wss 3943  ∪ cuni 4900   “ cima 5671  ⟶wf 6527  ‘cfv 6531  (class class class)co 7392  Topctop 22321   CnP ccnp 22655

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2702  ax-sep 5291  ax-nul 5298  ax-pow 5355  ax-pr 5419  ax-un 7707

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2533  df-eu 2562  df-clab 2709  df-cleq 2723  df-clel 2809  df-nfc 2884  df-ne 2940  df-ral 3061  df-rex 3070  df-rab 3432  df-v 3474  df-sbc 3773  df-csb 3889  df-dif 3946  df-un 3948  df-in 3950  df-ss 3960  df-nul 4318  df-if 4522  df-pw 4597  df-sn 4622  df-pr 4624  df-op 4628  df-uni 4901  df-iun 4991  df-br 5141  df-opab 5203  df-mpt 5224  df-id 5566  df-xp 5674  df-rel 5675  df-cnv 5676  df-co 5677  df-dm 5678  df-rn 5679  df-res 5680  df-ima 5681  df-iota 6483  df-fun 6533  df-fn 6534  df-f 6535  df-fv 6539  df-ov 7395  df-oprab 7396  df-mpo 7397  df-1st 7956  df-2nd 7957  df-map 8804  df-top 22322  df-topon 22339  df-cnp 22658

This theorem is referenced by:  cnpcl  22678  cnpf2  22680  cnpco  22697  cncnp2  22711  cnpresti  22718  lmcnp  22734  txcnpi  23038  cnpflfi  23429  cnpfcfi  23470