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Theorem shlesb1 5360
Description: Hilbert lattice ordering in terms of subspace sum.
Hypotheses
Ref Expression
shlesb1.1 AS
shlesb1.2 BS
Assertion
Ref Expression
shlesb1 (AB ↔ (A + B) = B)

Proof of Theorem shlesb1
StepHypRef Expression
1 ssid 1519 . . 3 BB
21biantrur 544 . 2 (AB ↔ (BBAB))
3 shlesb1.2 . . 3 BS
4 shlesb1.1 . . 3 AS
53, 4, 3shslub 5359 . 2 ((BBAB) ↔ (B + A) ⊆ B)
6 eqss 1516 . . . 4 ((A + B) = B ↔ ((A + B) ⊆ BB ⊆ (A + B)))
73, 4shsub1 5342 . . . . 5 B ⊆ (B + A)
84, 3shscom 5333 . . . . 5 (A + B) = (B + A)
97, 8sseqtr4 1533 . . . 4 B ⊆ (A + B)
106, 9mpbiranr 548 . . 3 ((A + B) = B ↔ (A + B) ⊆ B)
118sseq1i 1524 . . 3 ((A + B) ⊆ B ↔ (B + A) ⊆ B)
1210, 11bitr2 152 . 2 ((B + A) ⊆ B ↔ (A + B) = B)
132, 5, 123bitr 155 1 (AB ↔ (A + B) = B)
Colors of variables: wff set class
Syntax hints:   ↔ wb 127   ∧ wa 196   = wceq 1091   ∈ wcel 1092   ⊆ wss 1487  (class class class)co 3001   S csh 4967   + cph 4970
This theorem is referenced by:  shmods 5363
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-pow 1077  ax-hilex 4983  ax-hvaddcl 4984  ax-hvcom 4985  ax-hvaddid 4988
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-3an 583  df-ex 679  df-sb 853  df-eu 1009  df-mo 1010  df-clab 1093  df-cleq 1097  df-clel 1099  df-ral 1205  df-rex 1206  df-rab 1208  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-uni 1920  df-br 2063  df-opab 2098  df-id 2125  df-xp 2424  df-rel 2425  df-cnv 2426  df-co 2427  df-dm 2428  df-rn 2429  df-res 2430  df-ima 2431  df-fun 2432  df-fv 2438  df-opr 3003  df-oprab 3004  df-sh 5114  df-shsum 5275
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