Theorem hocofi 29543

Description: Mapping of composition of Hilbert space operators. (Contributed by NM, 14-Nov-2000.) (New usage is discouraged.)

Hypotheses

Ref	Expression
hoeq.1	⊢ 𝑆: ℋ⟶ ℋ
hoeq.2	⊢ 𝑇: ℋ⟶ ℋ

Assertion

Ref	Expression
hocofi	⊢ (𝑆 ∘ 𝑇): ℋ⟶ ℋ

Proof of Theorem hocofi

Step	Hyp	Ref	Expression
1		hoeq.1	. 2 ⊢ 𝑆: ℋ⟶ ℋ
2		hoeq.2	. 2 ⊢ 𝑇: ℋ⟶ ℋ
3		fco 6531	. 2 ⊢ ((𝑆: ℋ⟶ ℋ ∧ 𝑇: ℋ⟶ ℋ) → (𝑆 ∘ 𝑇): ℋ⟶ ℋ)
4	1, 2, 3	mp2an 690	1 ⊢ (𝑆 ∘ 𝑇): ℋ⟶ ℋ

Syntax hints:   ∘ ccom 5559  ⟶wf 6351   ℋchba 28696

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 2793  ax-sep 5203  ax-nul 5210  ax-pr 5330

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-sn 4568  df-pr 4570  df-op 4574  df-br 5067  df-opab 5129  df-id 5460  df-xp 5561  df-rel 5562  df-cnv 5563  df-co 5564  df-dm 5565  df-rn 5566  df-fun 6357  df-fn 6358  df-f 6359

This theorem is referenced by:  hocofni  29544  hocadddiri  29556  hocsubdiri  29557  ho2coi  29558  ho0coi  29565  hoid1i  29566  hoid1ri  29567  hoddii  29766  lnopcoi  29780  bdopcoi  29875  adjcoi  29877  nmopcoadji  29878  unierri  29881  pjsdii  29932  pjddii  29933  pjsdi2i  29934  pjss1coi  29940  pjss2coi  29941  pjorthcoi  29946  pjinvari  29968  pjclem1  29972  pjclem4  29976  pjadj2coi  29981  pj3lem1  29983  pj3si  29984  pj3cor1i  29986