Users' Mathboxes Mathbox for Mario Carneiro < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  cnpconn Structured version   Visualization version   GIF version

Theorem cnpconn 32479
Description: An image of a path-connected space is path-connected. (Contributed by Mario Carneiro, 24-Mar-2015.)
Hypothesis
Ref Expression
cnpconn.2 𝑌 = 𝐾
Assertion
Ref Expression
cnpconn ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → 𝐾 ∈ PConn)

Proof of Theorem cnpconn
Dummy variables 𝑓 𝑔 𝑢 𝑣 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 cntop2 21851 . . 3 (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
213ad2ant3 1131 . 2 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → 𝐾 ∈ Top)
3 eqid 2823 . . . . . . . . 9 𝐽 = 𝐽
43pconncn 32473 . . . . . . . 8 ((𝐽 ∈ PConn ∧ 𝑢 𝐽𝑣 𝐽) → ∃𝑔 ∈ (II Cn 𝐽)((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))
543expb 1116 . . . . . . 7 ((𝐽 ∈ PConn ∧ (𝑢 𝐽𝑣 𝐽)) → ∃𝑔 ∈ (II Cn 𝐽)((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))
653ad2antl1 1181 . . . . . 6 (((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) → ∃𝑔 ∈ (II Cn 𝐽)((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))
7 simprl 769 . . . . . . . 8 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → 𝑔 ∈ (II Cn 𝐽))
8 simpll3 1210 . . . . . . . 8 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → 𝐹 ∈ (𝐽 Cn 𝐾))
9 cnco 21876 . . . . . . . 8 ((𝑔 ∈ (II Cn 𝐽) ∧ 𝐹 ∈ (𝐽 Cn 𝐾)) → (𝐹𝑔) ∈ (II Cn 𝐾))
107, 8, 9syl2anc 586 . . . . . . 7 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → (𝐹𝑔) ∈ (II Cn 𝐾))
11 iiuni 23491 . . . . . . . . . . 11 (0[,]1) = II
1211, 3cnf 21856 . . . . . . . . . 10 (𝑔 ∈ (II Cn 𝐽) → 𝑔:(0[,]1)⟶ 𝐽)
137, 12syl 17 . . . . . . . . 9 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → 𝑔:(0[,]1)⟶ 𝐽)
14 0elunit 12858 . . . . . . . . 9 0 ∈ (0[,]1)
15 fvco3 6762 . . . . . . . . 9 ((𝑔:(0[,]1)⟶ 𝐽 ∧ 0 ∈ (0[,]1)) → ((𝐹𝑔)‘0) = (𝐹‘(𝑔‘0)))
1613, 14, 15sylancl 588 . . . . . . . 8 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → ((𝐹𝑔)‘0) = (𝐹‘(𝑔‘0)))
17 simprrl 779 . . . . . . . . 9 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → (𝑔‘0) = 𝑢)
1817fveq2d 6676 . . . . . . . 8 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → (𝐹‘(𝑔‘0)) = (𝐹𝑢))
1916, 18eqtrd 2858 . . . . . . 7 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → ((𝐹𝑔)‘0) = (𝐹𝑢))
20 1elunit 12859 . . . . . . . . 9 1 ∈ (0[,]1)
21 fvco3 6762 . . . . . . . . 9 ((𝑔:(0[,]1)⟶ 𝐽 ∧ 1 ∈ (0[,]1)) → ((𝐹𝑔)‘1) = (𝐹‘(𝑔‘1)))
2213, 20, 21sylancl 588 . . . . . . . 8 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → ((𝐹𝑔)‘1) = (𝐹‘(𝑔‘1)))
23 simprrr 780 . . . . . . . . 9 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → (𝑔‘1) = 𝑣)
2423fveq2d 6676 . . . . . . . 8 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → (𝐹‘(𝑔‘1)) = (𝐹𝑣))
2522, 24eqtrd 2858 . . . . . . 7 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → ((𝐹𝑔)‘1) = (𝐹𝑣))
26 fveq1 6671 . . . . . . . . . 10 (𝑓 = (𝐹𝑔) → (𝑓‘0) = ((𝐹𝑔)‘0))
2726eqeq1d 2825 . . . . . . . . 9 (𝑓 = (𝐹𝑔) → ((𝑓‘0) = (𝐹𝑢) ↔ ((𝐹𝑔)‘0) = (𝐹𝑢)))
28 fveq1 6671 . . . . . . . . . 10 (𝑓 = (𝐹𝑔) → (𝑓‘1) = ((𝐹𝑔)‘1))
2928eqeq1d 2825 . . . . . . . . 9 (𝑓 = (𝐹𝑔) → ((𝑓‘1) = (𝐹𝑣) ↔ ((𝐹𝑔)‘1) = (𝐹𝑣)))
3027, 29anbi12d 632 . . . . . . . 8 (𝑓 = (𝐹𝑔) → (((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)) ↔ (((𝐹𝑔)‘0) = (𝐹𝑢) ∧ ((𝐹𝑔)‘1) = (𝐹𝑣))))
3130rspcev 3625 . . . . . . 7 (((𝐹𝑔) ∈ (II Cn 𝐾) ∧ (((𝐹𝑔)‘0) = (𝐹𝑢) ∧ ((𝐹𝑔)‘1) = (𝐹𝑣))) → ∃𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)))
3210, 19, 25, 31syl12anc 834 . . . . . 6 ((((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) ∧ (𝑔 ∈ (II Cn 𝐽) ∧ ((𝑔‘0) = 𝑢 ∧ (𝑔‘1) = 𝑣))) → ∃𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)))
336, 32rexlimddv 3293 . . . . 5 (((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) ∧ (𝑢 𝐽𝑣 𝐽)) → ∃𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)))
3433ralrimivva 3193 . . . 4 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → ∀𝑢 𝐽𝑣 𝐽𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)))
35 cnpconn.2 . . . . . . . . 9 𝑌 = 𝐾
363, 35cnf 21856 . . . . . . . 8 (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹: 𝐽𝑌)
37363ad2ant3 1131 . . . . . . 7 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → 𝐹: 𝐽𝑌)
38 forn 6595 . . . . . . . 8 (𝐹:𝑋onto𝑌 → ran 𝐹 = 𝑌)
39383ad2ant2 1130 . . . . . . 7 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → ran 𝐹 = 𝑌)
40 dffo2 6596 . . . . . . 7 (𝐹: 𝐽onto𝑌 ↔ (𝐹: 𝐽𝑌 ∧ ran 𝐹 = 𝑌))
4137, 39, 40sylanbrc 585 . . . . . 6 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → 𝐹: 𝐽onto𝑌)
42 eqeq2 2835 . . . . . . . . 9 ((𝐹𝑣) = 𝑦 → ((𝑓‘1) = (𝐹𝑣) ↔ (𝑓‘1) = 𝑦))
4342anbi2d 630 . . . . . . . 8 ((𝐹𝑣) = 𝑦 → (((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)) ↔ ((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦)))
4443rexbidv 3299 . . . . . . 7 ((𝐹𝑣) = 𝑦 → (∃𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)) ↔ ∃𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦)))
4544cbvfo 7047 . . . . . 6 (𝐹: 𝐽onto𝑌 → (∀𝑣 𝐽𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)) ↔ ∀𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦)))
4641, 45syl 17 . . . . 5 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → (∀𝑣 𝐽𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)) ↔ ∀𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦)))
4746ralbidv 3199 . . . 4 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → (∀𝑢 𝐽𝑣 𝐽𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = (𝐹𝑣)) ↔ ∀𝑢 𝐽𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦)))
4834, 47mpbid 234 . . 3 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → ∀𝑢 𝐽𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦))
49 eqeq2 2835 . . . . . . . 8 ((𝐹𝑢) = 𝑥 → ((𝑓‘0) = (𝐹𝑢) ↔ (𝑓‘0) = 𝑥))
5049anbi1d 631 . . . . . . 7 ((𝐹𝑢) = 𝑥 → (((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦) ↔ ((𝑓‘0) = 𝑥 ∧ (𝑓‘1) = 𝑦)))
5150rexbidv 3299 . . . . . 6 ((𝐹𝑢) = 𝑥 → (∃𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦) ↔ ∃𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = 𝑥 ∧ (𝑓‘1) = 𝑦)))
5251ralbidv 3199 . . . . 5 ((𝐹𝑢) = 𝑥 → (∀𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦) ↔ ∀𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = 𝑥 ∧ (𝑓‘1) = 𝑦)))
5352cbvfo 7047 . . . 4 (𝐹: 𝐽onto𝑌 → (∀𝑢 𝐽𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦) ↔ ∀𝑥𝑌𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = 𝑥 ∧ (𝑓‘1) = 𝑦)))
5441, 53syl 17 . . 3 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → (∀𝑢 𝐽𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = (𝐹𝑢) ∧ (𝑓‘1) = 𝑦) ↔ ∀𝑥𝑌𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = 𝑥 ∧ (𝑓‘1) = 𝑦)))
5548, 54mpbid 234 . 2 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → ∀𝑥𝑌𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = 𝑥 ∧ (𝑓‘1) = 𝑦))
5635ispconn 32472 . 2 (𝐾 ∈ PConn ↔ (𝐾 ∈ Top ∧ ∀𝑥𝑌𝑦𝑌𝑓 ∈ (II Cn 𝐾)((𝑓‘0) = 𝑥 ∧ (𝑓‘1) = 𝑦)))
572, 55, 56sylanbrc 585 1 ((𝐽 ∈ PConn ∧ 𝐹:𝑋onto𝑌𝐹 ∈ (𝐽 Cn 𝐾)) → 𝐾 ∈ PConn)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 208  wa 398  w3a 1083   = wceq 1537  wcel 2114  wral 3140  wrex 3141   cuni 4840  ran crn 5558  ccom 5561  wf 6353  ontowfo 6355  cfv 6357  (class class class)co 7158  0cc0 10539  1c1 10540  [,]cicc 12744  Topctop 21503   Cn ccn 21834  IIcii 23485  PConncpconn 32468
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 2795  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463  ax-cnex 10595  ax-resscn 10596  ax-1cn 10597  ax-icn 10598  ax-addcl 10599  ax-addrcl 10600  ax-mulcl 10601  ax-mulrcl 10602  ax-mulcom 10603  ax-addass 10604  ax-mulass 10605  ax-distr 10606  ax-i2m1 10607  ax-1ne0 10608  ax-1rid 10609  ax-rnegex 10610  ax-rrecex 10611  ax-cnre 10612  ax-pre-lttri 10613  ax-pre-lttrn 10614  ax-pre-ltadd 10615  ax-pre-mulgt0 10616  ax-pre-sup 10617
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-nel 3126  df-ral 3145  df-rex 3146  df-reu 3147  df-rmo 3148  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-pss 3956  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-tp 4574  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-tr 5175  df-id 5462  df-eprel 5467  df-po 5476  df-so 5477  df-fr 5516  df-we 5518  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-pred 6150  df-ord 6196  df-on 6197  df-lim 6198  df-suc 6199  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-riota 7116  df-ov 7161  df-oprab 7162  df-mpo 7163  df-om 7583  df-1st 7691  df-2nd 7692  df-wrecs 7949  df-recs 8010  df-rdg 8048  df-er 8291  df-map 8410  df-en 8512  df-dom 8513  df-sdom 8514  df-sup 8908  df-inf 8909  df-pnf 10679  df-mnf 10680  df-xr 10681  df-ltxr 10682  df-le 10683  df-sub 10874  df-neg 10875  df-div 11300  df-nn 11641  df-2 11703  df-3 11704  df-n0 11901  df-z 11985  df-uz 12247  df-q 12352  df-rp 12393  df-xneg 12510  df-xadd 12511  df-xmul 12512  df-icc 12748  df-seq 13373  df-exp 13433  df-cj 14460  df-re 14461  df-im 14462  df-sqrt 14596  df-abs 14597  df-topgen 16719  df-psmet 20539  df-xmet 20540  df-met 20541  df-bl 20542  df-mopn 20543  df-top 21504  df-topon 21521  df-bases 21556  df-cn 21837  df-ii 23487  df-pconn 32470
This theorem is referenced by:  qtoppconn  32485
  Copyright terms: Public domain W3C validator