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Theorem pjmfn 31697
Description: Functionality of the projection function. (Contributed by NM, 24-Apr-2006.) (New usage is discouraged.)
Assertion
Ref Expression
pjmfn proj Fn C

Proof of Theorem pjmfn
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ax-hilex 30981 . . 3 ℋ ∈ V
21mptex 7163 . 2 (𝑥 ∈ ℋ ↦ (𝑧𝑦 ∈ (⊥‘)𝑥 = (𝑧 + 𝑦))) ∈ V
3 df-pjh 31377 . 2 proj = (C ↦ (𝑥 ∈ ℋ ↦ (𝑧𝑦 ∈ (⊥‘)𝑥 = (𝑧 + 𝑦))))
42, 3fnmpti 6629 1 proj Fn C
Colors of variables: wff setvar class
Syntax hints:   = wceq 1541  wrex 3057  cmpt 5174   Fn wfn 6481  cfv 6486  crio 7308  (class class class)co 7352  chba 30901   + cva 30902   C cch 30911  cort 30912  projcpjh 30919
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 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2705  ax-rep 5219  ax-sep 5236  ax-nul 5246  ax-pr 5372  ax-hilex 30981
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 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-nfc 2882  df-ne 2930  df-ral 3049  df-rex 3058  df-reu 3348  df-rab 3397  df-v 3439  df-sbc 3738  df-csb 3847  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4283  df-if 4475  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-iun 4943  df-br 5094  df-opab 5156  df-mpt 5175  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-iota 6442  df-fun 6488  df-fn 6489  df-f 6490  df-f1 6491  df-fo 6492  df-f1o 6493  df-fv 6494  df-pjh 31377
This theorem is referenced by:  pjmf1  31698  pjssdif1i  32157  dfpjop  32164  pjadj3  32170  pjcmul1i  32183  pjcmul2i  32184
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