ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  issmo2 GIF version

Theorem issmo2 6287
Description: Alternate definition of a strictly monotone ordinal function. (Contributed by Mario Carneiro, 12-Mar-2013.)
Assertion
Ref Expression
issmo2 (𝐹:𝐴⟢𝐡 β†’ ((𝐡 βŠ† On ∧ Ord 𝐴 ∧ βˆ€π‘₯ ∈ 𝐴 βˆ€π‘¦ ∈ π‘₯ (πΉβ€˜π‘¦) ∈ (πΉβ€˜π‘₯)) β†’ Smo 𝐹))
Distinct variable groups:   π‘₯,𝐴   π‘₯,𝐹,𝑦
Allowed substitution hints:   𝐴(𝑦)   𝐡(π‘₯,𝑦)

Proof of Theorem issmo2
StepHypRef Expression
1 fss 5376 . . . . 5 ((𝐹:𝐴⟢𝐡 ∧ 𝐡 βŠ† On) β†’ 𝐹:𝐴⟢On)
21ex 115 . . . 4 (𝐹:𝐴⟢𝐡 β†’ (𝐡 βŠ† On β†’ 𝐹:𝐴⟢On))
3 fdm 5370 . . . . 5 (𝐹:𝐴⟢𝐡 β†’ dom 𝐹 = 𝐴)
43feq2d 5352 . . . 4 (𝐹:𝐴⟢𝐡 β†’ (𝐹:dom 𝐹⟢On ↔ 𝐹:𝐴⟢On))
52, 4sylibrd 169 . . 3 (𝐹:𝐴⟢𝐡 β†’ (𝐡 βŠ† On β†’ 𝐹:dom 𝐹⟢On))
6 ordeq 4371 . . . . 5 (dom 𝐹 = 𝐴 β†’ (Ord dom 𝐹 ↔ Ord 𝐴))
73, 6syl 14 . . . 4 (𝐹:𝐴⟢𝐡 β†’ (Ord dom 𝐹 ↔ Ord 𝐴))
87biimprd 158 . . 3 (𝐹:𝐴⟢𝐡 β†’ (Ord 𝐴 β†’ Ord dom 𝐹))
93raleqdv 2678 . . . 4 (𝐹:𝐴⟢𝐡 β†’ (βˆ€π‘₯ ∈ dom πΉβˆ€π‘¦ ∈ π‘₯ (πΉβ€˜π‘¦) ∈ (πΉβ€˜π‘₯) ↔ βˆ€π‘₯ ∈ 𝐴 βˆ€π‘¦ ∈ π‘₯ (πΉβ€˜π‘¦) ∈ (πΉβ€˜π‘₯)))
109biimprd 158 . . 3 (𝐹:𝐴⟢𝐡 β†’ (βˆ€π‘₯ ∈ 𝐴 βˆ€π‘¦ ∈ π‘₯ (πΉβ€˜π‘¦) ∈ (πΉβ€˜π‘₯) β†’ βˆ€π‘₯ ∈ dom πΉβˆ€π‘¦ ∈ π‘₯ (πΉβ€˜π‘¦) ∈ (πΉβ€˜π‘₯)))
115, 8, 103anim123d 1319 . 2 (𝐹:𝐴⟢𝐡 β†’ ((𝐡 βŠ† On ∧ Ord 𝐴 ∧ βˆ€π‘₯ ∈ 𝐴 βˆ€π‘¦ ∈ π‘₯ (πΉβ€˜π‘¦) ∈ (πΉβ€˜π‘₯)) β†’ (𝐹:dom 𝐹⟢On ∧ Ord dom 𝐹 ∧ βˆ€π‘₯ ∈ dom πΉβˆ€π‘¦ ∈ π‘₯ (πΉβ€˜π‘¦) ∈ (πΉβ€˜π‘₯))))
12 dfsmo2 6285 . 2 (Smo 𝐹 ↔ (𝐹:dom 𝐹⟢On ∧ Ord dom 𝐹 ∧ βˆ€π‘₯ ∈ dom πΉβˆ€π‘¦ ∈ π‘₯ (πΉβ€˜π‘¦) ∈ (πΉβ€˜π‘₯)))
1311, 12syl6ibr 162 1 (𝐹:𝐴⟢𝐡 β†’ ((𝐡 βŠ† On ∧ Ord 𝐴 ∧ βˆ€π‘₯ ∈ 𝐴 βˆ€π‘¦ ∈ π‘₯ (πΉβ€˜π‘¦) ∈ (πΉβ€˜π‘₯)) β†’ Smo 𝐹))
Colors of variables: wff set class
Syntax hints:   β†’ wi 4   ↔ wb 105   ∧ w3a 978   = wceq 1353   ∈ wcel 2148  βˆ€wral 2455   βŠ† wss 3129  Ord word 4361  Oncon0 4362  dom cdm 4625  βŸΆwf 5211  β€˜cfv 5215  Smo wsmo 6283
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-v 2739  df-in 3135  df-ss 3142  df-uni 3810  df-tr 4101  df-iord 4365  df-fn 5218  df-f 5219  df-smo 6284
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator