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Theorem tposfo2 7545
 Description: Condition for a surjective transposition. (Contributed by NM, 10-Sep-2015.)
Assertion
Ref Expression
tposfo2 (Rel 𝐴 → (𝐹:𝐴onto𝐵 → tpos 𝐹:𝐴onto𝐵))

Proof of Theorem tposfo2
StepHypRef Expression
1 tposfn2 7544 . . . 4 (Rel 𝐴 → (𝐹 Fn 𝐴 → tpos 𝐹 Fn 𝐴))
21adantrd 485 . . 3 (Rel 𝐴 → ((𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵) → tpos 𝐹 Fn 𝐴))
3 fndm 6151 . . . . . . . . 9 (𝐹 Fn 𝐴 → dom 𝐹 = 𝐴)
43releqd 5360 . . . . . . . 8 (𝐹 Fn 𝐴 → (Rel dom 𝐹 ↔ Rel 𝐴))
54biimparc 505 . . . . . . 7 ((Rel 𝐴𝐹 Fn 𝐴) → Rel dom 𝐹)
6 rntpos 7535 . . . . . . 7 (Rel dom 𝐹 → ran tpos 𝐹 = ran 𝐹)
75, 6syl 17 . . . . . 6 ((Rel 𝐴𝐹 Fn 𝐴) → ran tpos 𝐹 = ran 𝐹)
87eqeq1d 2762 . . . . 5 ((Rel 𝐴𝐹 Fn 𝐴) → (ran tpos 𝐹 = 𝐵 ↔ ran 𝐹 = 𝐵))
98biimprd 238 . . . 4 ((Rel 𝐴𝐹 Fn 𝐴) → (ran 𝐹 = 𝐵 → ran tpos 𝐹 = 𝐵))
109expimpd 630 . . 3 (Rel 𝐴 → ((𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵) → ran tpos 𝐹 = 𝐵))
112, 10jcad 556 . 2 (Rel 𝐴 → ((𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵) → (tpos 𝐹 Fn 𝐴 ∧ ran tpos 𝐹 = 𝐵)))
12 df-fo 6055 . 2 (𝐹:𝐴onto𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵))
13 df-fo 6055 . 2 (tpos 𝐹:𝐴onto𝐵 ↔ (tpos 𝐹 Fn 𝐴 ∧ ran tpos 𝐹 = 𝐵))
1411, 12, 133imtr4g 285 1 (Rel 𝐴 → (𝐹:𝐴onto𝐵 → tpos 𝐹:𝐴onto𝐵))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ wa 383   = wceq 1632  ◡ccnv 5265  dom cdm 5266  ran crn 5267  Rel wrel 5271   Fn wfn 6044  –onto→wfo 6047  tpos ctpos 7521 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-8 2141  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-sep 4933  ax-nul 4941  ax-pow 4992  ax-pr 5055  ax-un 7115 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ne 2933  df-ral 3055  df-rex 3056  df-rab 3059  df-v 3342  df-sbc 3577  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-pw 4304  df-sn 4322  df-pr 4324  df-op 4328  df-uni 4589  df-br 4805  df-opab 4865  df-mpt 4882  df-id 5174  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-rn 5277  df-res 5278  df-ima 5279  df-iota 6012  df-fun 6051  df-fn 6052  df-fo 6055  df-fv 6057  df-tpos 7522 This theorem is referenced by:  tposf2  7546  tposf1o2  7548  tposfo  7549  oppglsm  18277
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