Theorem hocofi 28934

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 6219	. 2 ⊢ ((𝑆: ℋ⟶ ℋ ∧ 𝑇: ℋ⟶ ℋ) → (𝑆 ∘ 𝑇): ℋ⟶ ℋ)
4	1, 2, 3	mp2an 710	1 ⊢ (𝑆 ∘ 𝑇): ℋ⟶ ℋ

Syntax hints:   ∘ ccom 5270  ⟶wf 6045   ℋchil 28085

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-sep 4933  ax-nul 4941  ax-pr 5055

This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ral 3055  df-rex 3056  df-rab 3059  df-v 3342  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-sn 4322  df-pr 4324  df-op 4328  df-br 4805  df-opab 4865  df-id 5174  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-rn 5277  df-fun 6051  df-fn 6052  df-f 6053

This theorem is referenced by:  hocofni  28935  hocadddiri  28947  hocsubdiri  28948  ho2coi  28949  ho0coi  28956  hoid1i  28957  hoid1ri  28958  hoddii  29157  lnopcoi  29171  bdopcoi  29266  adjcoi  29268  nmopcoadji  29269  unierri  29272  pjsdii  29323  pjddii  29324  pjsdi2i  29325  pjss1coi  29331  pjss2coi  29332  pjorthcoi  29337  pjinvari  29359  pjclem1  29363  pjclem4  29367  pjadj2coi  29372  pj3lem1  29374  pj3si  29375  pj3cor1i  29377