Theorem dmdit 10229

Description: Consequence of the dual modular pair property.

Assertion

Ref	Expression
dmdit	|- (((A e. CH /\ B e. CH /\ C e. CH) /\ (A MH* B /\ B (_ C)) -> ((C i^i A) vH B) = (C i^i (A vH B)))

Proof of Theorem dmdit

Step	Hyp	Ref	Expression
1		dmdbrt 10226	. . . . 5 |- ((A e. CH /\ B e. CH) -> (A MH* B <-> A.x e. CH (B (_ x -> ((x i^i A) vH B) = (x i^i (A vH B)))))
2	1	biimpd 153	. . . 4 |- ((A e. CH /\ B e. CH) -> (A MH* B -> A.x e. CH (B (_ x -> ((x i^i A) vH B) = (x i^i (A vH B)))))
3		sseq2 2083	. . . . . 6 |- (x = C -> (B (_ x <-> B (_ C))
4		ineq1 2210	. . . . . . . 8 |- (x = C -> (x i^i A) = (C i^i A))
5	4	opreq1d 3975	. . . . . . 7 |- (x = C -> ((x i^i A) vH B) = ((C i^i A) vH B))
6		ineq1 2210	. . . . . . 7 |- (x = C -> (x i^i (A vH B)) = (C i^i (A vH B)))
7	5, 6	eqeq12d 1489	. . . . . 6 |- (x = C -> (((x i^i A) vH B) = (x i^i (A vH B)) <-> ((C i^i A) vH B) = (C i^i (A vH B))))
8	3, 7	imbi12d 626	. . . . 5 |- (x = C -> ((B (_ x -> ((x i^i A) vH B) = (x i^i (A vH B))) <-> (B (_ C -> ((C i^i A) vH B) = (C i^i (A vH B)))))
9	8	rcla4v 1873	. . . 4 |- (C e. CH -> (A.x e. CH (B (_ x -> ((x i^i A) vH B) = (x i^i (A vH B))) -> (B (_ C -> ((C i^i A) vH B) = (C i^i (A vH B)))))
10	2, 9	sylan9 468	. . 3 |- (((A e. CH /\ B e. CH) /\ C e. CH) -> (A MH* B -> (B (_ C -> ((C i^i A) vH B) = (C i^i (A vH B)))))
11	10	3impa 828	. 2 |- ((A e. CH /\ B e. CH /\ C e. CH) -> (A MH* B -> (B (_ C -> ((C i^i A) vH B) = (C i^i (A vH B)))))
12	11	imp32 363	1 |- (((A e. CH /\ B e. CH /\ C e. CH) /\ (A MH* B /\ B (_ C)) -> ((C i^i A) vH B) = (C i^i (A vH B)))

Syntax hints:   -> wi 3   /\ wa 223   /\ w3a 775   = wceq 956   e. wcel 958  A.wral 1645   i^i cin 2046   (_ wss 2047   class class class wbr 2619  (class class class)co 3963  CHcch 8798   vH chj 8802   MH* cdmd 8836

This theorem is referenced by:  dmdi2 10231  dmdsl3t 10242  csmdsym 10261  mdsymlem1 10330

This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 962  ax-gen 963  ax-8 964  ax-10 966  ax-11 967  ax-12 968  ax-13 969  ax-14 970  ax-17 971  ax-4 973  ax-5o 975  ax-6o 978  ax-9o 1123  ax-10o 1140  ax-16 1210  ax-11o 1218  ax-ext 1459  ax-sep 2703  ax-pow 2742  ax-pr 2779

This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-3an 777  df-ex 981  df-sb 1172  df-eu 1382  df-mo 1383  df-clab 1464  df-cleq 1469  df-clel 1472  df-ne 1587  df-ral 1649  df-v 1812  df-dif 2049  df-un 2050  df-in 2051  df-ss 2053  df-nul 2281  df-pw 2402  df-sn 2412  df-pr 2413  df-op 2416  df-uni 2504  df-br 2620  df-opab 2667  df-xp 3184  df-cnv 3186  df-dm 3188  df-rn 3189  df-res 3190  df-ima 3191  df-fv 3198  df-opr 3965  df-dmd 10208

Copyright terms: Public domain