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Theorem mptelpm 45212
Description: A function in maps-to notation is a partial map . (Contributed by Glauco Siliprandi, 5-Apr-2020.)
Hypotheses
Ref Expression
mptelpm.b ((𝜑𝑥𝐴) → 𝐵𝐶)
mptelpm.a (𝜑𝐴𝐷)
mptelpm.c (𝜑𝐶𝑉)
mptelpm.d (𝜑𝐷𝑊)
Assertion
Ref Expression
mptelpm (𝜑 → (𝑥𝐴𝐵) ∈ (𝐶pm 𝐷))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐶   𝜑,𝑥
Allowed substitution hints:   𝐵(𝑥)   𝐷(𝑥)   𝑉(𝑥)   𝑊(𝑥)

Proof of Theorem mptelpm
StepHypRef Expression
1 mptelpm.b . . . . 5 ((𝜑𝑥𝐴) → 𝐵𝐶)
21fmpttd 7048 . . . 4 (𝜑 → (𝑥𝐴𝐵):𝐴𝐶)
3 eqid 2731 . . . . . . 7 (𝑥𝐴𝐵) = (𝑥𝐴𝐵)
43, 1dmmptd 6626 . . . . . 6 (𝜑 → dom (𝑥𝐴𝐵) = 𝐴)
54eqcomd 2737 . . . . 5 (𝜑𝐴 = dom (𝑥𝐴𝐵))
65feq2d 6635 . . . 4 (𝜑 → ((𝑥𝐴𝐵):𝐴𝐶 ↔ (𝑥𝐴𝐵):dom (𝑥𝐴𝐵)⟶𝐶))
72, 6mpbid 232 . . 3 (𝜑 → (𝑥𝐴𝐵):dom (𝑥𝐴𝐵)⟶𝐶)
8 mptelpm.a . . . 4 (𝜑𝐴𝐷)
94, 8eqsstrd 3969 . . 3 (𝜑 → dom (𝑥𝐴𝐵) ⊆ 𝐷)
107, 9jca 511 . 2 (𝜑 → ((𝑥𝐴𝐵):dom (𝑥𝐴𝐵)⟶𝐶 ∧ dom (𝑥𝐴𝐵) ⊆ 𝐷))
11 mptelpm.c . . 3 (𝜑𝐶𝑉)
12 mptelpm.d . . 3 (𝜑𝐷𝑊)
13 elpm2g 8768 . . 3 ((𝐶𝑉𝐷𝑊) → ((𝑥𝐴𝐵) ∈ (𝐶pm 𝐷) ↔ ((𝑥𝐴𝐵):dom (𝑥𝐴𝐵)⟶𝐶 ∧ dom (𝑥𝐴𝐵) ⊆ 𝐷)))
1411, 12, 13syl2anc 584 . 2 (𝜑 → ((𝑥𝐴𝐵) ∈ (𝐶pm 𝐷) ↔ ((𝑥𝐴𝐵):dom (𝑥𝐴𝐵)⟶𝐶 ∧ dom (𝑥𝐴𝐵) ⊆ 𝐷)))
1510, 14mpbird 257 1 (𝜑 → (𝑥𝐴𝐵) ∈ (𝐶pm 𝐷))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395  wcel 2111  wss 3902  cmpt 5172  dom cdm 5616  wf 6477  (class class class)co 7346  pm cpm 8751
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 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-10 2144  ax-11 2160  ax-12 2180  ax-ext 2703  ax-sep 5234  ax-nul 5244  ax-pow 5303  ax-pr 5370  ax-un 7668
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2535  df-eu 2564  df-clab 2710  df-cleq 2723  df-clel 2806  df-nfc 2881  df-ne 2929  df-ral 3048  df-rex 3057  df-rab 3396  df-v 3438  df-sbc 3742  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4284  df-if 4476  df-pw 4552  df-sn 4577  df-pr 4579  df-op 4583  df-uni 4860  df-br 5092  df-opab 5154  df-mpt 5173  df-id 5511  df-xp 5622  df-rel 5623  df-cnv 5624  df-co 5625  df-dm 5626  df-rn 5627  df-res 5628  df-ima 5629  df-iota 6437  df-fun 6483  df-fn 6484  df-f 6485  df-fv 6489  df-ov 7349  df-oprab 7350  df-mpo 7351  df-pm 8753
This theorem is referenced by:  dvnmptconst  45978  dvnmul  45980
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