Theorem hocofi 29179

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 6294	. 2 ⊢ ((𝑆: ℋ⟶ ℋ ∧ 𝑇: ℋ⟶ ℋ) → (𝑆 ∘ 𝑇): ℋ⟶ ℋ)
4	1, 2, 3	mp2an 685	1 ⊢ (𝑆 ∘ 𝑇): ℋ⟶ ℋ

Syntax hints:   ∘ ccom 5345  ⟶wf 6118   ℋchba 28330

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1896  ax-4 1910  ax-5 2011  ax-6 2077  ax-7 2114  ax-9 2175  ax-10 2194  ax-11 2209  ax-12 2222  ax-13 2390  ax-ext 2802  ax-sep 5004  ax-nul 5012  ax-pr 5126

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 881  df-3an 1115  df-tru 1662  df-ex 1881  df-nf 1885  df-sb 2070  df-mo 2604  df-eu 2639  df-clab 2811  df-cleq 2817  df-clel 2820  df-nfc 2957  df-ral 3121  df-rex 3122  df-rab 3125  df-v 3415  df-dif 3800  df-un 3802  df-in 3804  df-ss 3811  df-nul 4144  df-if 4306  df-sn 4397  df-pr 4399  df-op 4403  df-br 4873  df-opab 4935  df-id 5249  df-xp 5347  df-rel 5348  df-cnv 5349  df-co 5350  df-dm 5351  df-rn 5352  df-fun 6124  df-fn 6125  df-f 6126

This theorem is referenced by:  hocofni  29180  hocadddiri  29192  hocsubdiri  29193  ho2coi  29194  ho0coi  29201  hoid1i  29202  hoid1ri  29203  hoddii  29402  lnopcoi  29416  bdopcoi  29511  adjcoi  29513  nmopcoadji  29514  unierri  29517  pjsdii  29568  pjddii  29569  pjsdi2i  29570  pjss1coi  29576  pjss2coi  29577  pjorthcoi  29582  pjinvari  29604  pjclem1  29608  pjclem4  29612  pjadj2coi  29617  pj3lem1  29619  pj3si  29620  pj3cor1i  29622