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Theorem lindfres 20967
Description: Any restriction of an independent family is independent. (Contributed by Stefan O'Rear, 24-Feb-2015.)
Assertion
Ref Expression
lindfres ((𝑊 ∈ LMod ∧ 𝐹 LIndF 𝑊) → (𝐹𝑋) LIndF 𝑊)

Proof of Theorem lindfres
StepHypRef Expression
1 coires1 6117 . . 3 (𝐹 ∘ ( I ↾ dom (𝐹𝑋))) = (𝐹 ↾ dom (𝐹𝑋))
2 resdmres 6089 . . 3 (𝐹 ↾ dom (𝐹𝑋)) = (𝐹𝑋)
31, 2eqtri 2844 . 2 (𝐹 ∘ ( I ↾ dom (𝐹𝑋))) = (𝐹𝑋)
4 f1oi 6652 . . . . 5 ( I ↾ dom (𝐹𝑋)):dom (𝐹𝑋)–1-1-onto→dom (𝐹𝑋)
5 f1of1 6614 . . . . 5 (( I ↾ dom (𝐹𝑋)):dom (𝐹𝑋)–1-1-onto→dom (𝐹𝑋) → ( I ↾ dom (𝐹𝑋)):dom (𝐹𝑋)–1-1→dom (𝐹𝑋))
64, 5ax-mp 5 . . . 4 ( I ↾ dom (𝐹𝑋)):dom (𝐹𝑋)–1-1→dom (𝐹𝑋)
7 resss 5878 . . . . 5 (𝐹𝑋) ⊆ 𝐹
8 dmss 5771 . . . . 5 ((𝐹𝑋) ⊆ 𝐹 → dom (𝐹𝑋) ⊆ dom 𝐹)
97, 8ax-mp 5 . . . 4 dom (𝐹𝑋) ⊆ dom 𝐹
10 f1ss 6580 . . . 4 ((( I ↾ dom (𝐹𝑋)):dom (𝐹𝑋)–1-1→dom (𝐹𝑋) ∧ dom (𝐹𝑋) ⊆ dom 𝐹) → ( I ↾ dom (𝐹𝑋)):dom (𝐹𝑋)–1-1→dom 𝐹)
116, 9, 10mp2an 690 . . 3 ( I ↾ dom (𝐹𝑋)):dom (𝐹𝑋)–1-1→dom 𝐹
12 f1lindf 20966 . . 3 ((𝑊 ∈ LMod ∧ 𝐹 LIndF 𝑊 ∧ ( I ↾ dom (𝐹𝑋)):dom (𝐹𝑋)–1-1→dom 𝐹) → (𝐹 ∘ ( I ↾ dom (𝐹𝑋))) LIndF 𝑊)
1311, 12mp3an3 1446 . 2 ((𝑊 ∈ LMod ∧ 𝐹 LIndF 𝑊) → (𝐹 ∘ ( I ↾ dom (𝐹𝑋))) LIndF 𝑊)
143, 13eqbrtrrid 5102 1 ((𝑊 ∈ LMod ∧ 𝐹 LIndF 𝑊) → (𝐹𝑋) LIndF 𝑊)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 398  wcel 2114  wss 3936   class class class wbr 5066   I cid 5459  dom cdm 5555  cres 5557  ccom 5559  1-1wf1 6352  1-1-ontowf1o 6354  LModclmod 19634   LIndF clindf 20948
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-rep 5190  ax-sep 5203  ax-nul 5210  ax-pow 5266  ax-pr 5330  ax-un 7461
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-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rmo 3146  df-rab 3147  df-v 3496  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4839  df-int 4877  df-iun 4921  df-br 5067  df-opab 5129  df-mpt 5147  df-id 5460  df-xp 5561  df-rel 5562  df-cnv 5563  df-co 5564  df-dm 5565  df-rn 5566  df-res 5567  df-ima 5568  df-iota 6314  df-fun 6357  df-fn 6358  df-f 6359  df-f1 6360  df-fo 6361  df-f1o 6362  df-fv 6363  df-riota 7114  df-ov 7159  df-slot 16487  df-base 16489  df-0g 16715  df-mgm 17852  df-sgrp 17901  df-mnd 17912  df-grp 18106  df-lmod 19636  df-lss 19704  df-lsp 19744  df-lindf 20950
This theorem is referenced by:  lindsss  20968
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