Theorem imainss 5042

Description: An upper bound for intersection with an image. Theorem 41 of [Suppes] p. 66. (Contributed by set.mm contributors, 11-Aug-2004.)

Assertion

Ref	Expression
imainss	|- ((R"A) i^i B) C_ (R"(A i^i (`'R"B)))

Proof of Theorem imainss

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpll 730	. . . . . 6 |- (((x e. A /\ xRy) /\ y e. B) -> x e. A)
2		brcnv 4892	. . . . . . . . 9 |- (y`'Rx <-> xRy)
3		19.8a 1756	. . . . . . . . 9 |- ((y e. B /\ y`'Rx) -> E.y(y e. B /\ y`'Rx))
4	2, 3	sylan2br 462	. . . . . . . 8 |- ((y e. B /\ xRy) -> E.y(y e. B /\ y`'Rx))
5	4	ancoms 439	. . . . . . 7 |- ((xRy /\ y e. B) -> E.y(y e. B /\ y`'Rx))
6	5	adantll 694	. . . . . 6 |- (((x e. A /\ xRy) /\ y e. B) -> E.y(y e. B /\ y`'Rx))
7	1, 6	jca 518	. . . . 5 |- (((x e. A /\ xRy) /\ y e. B) -> (x e. A /\ E.y(y e. B /\ y`'Rx)))
8		simplr 731	. . . . 5 |- (((x e. A /\ xRy) /\ y e. B) -> xRy)
9		elin 3219	. . . . . . 7 |- (x e. (A i^i (`'R"B)) <-> (x e. A /\ x e. (`'R"B)))
10		elima2 4755	. . . . . . . 8 |- (x e. (`'R"B) <-> E.y(y e. B /\ y`'Rx))
11	10	anbi2i 675	. . . . . . 7 |- ((x e. A /\ x e. (`'R"B)) <-> (x e. A /\ E.y(y e. B /\ y`'Rx)))
12	9, 11	bitri 240	. . . . . 6 |- (x e. (A i^i (`'R"B)) <-> (x e. A /\ E.y(y e. B /\ y`'Rx)))
13	12	anbi1i 676	. . . . 5 |- ((x e. (A i^i (`'R"B)) /\ xRy) <-> ((x e. A /\ E.y(y e. B /\ y`'Rx)) /\ xRy))
14	7, 8, 13	sylanbrc 645	. . . 4 |- (((x e. A /\ xRy) /\ y e. B) -> (x e. (A i^i (`'R"B)) /\ xRy))
15	14	eximi 1576	. . 3 |- (E.x((x e. A /\ xRy) /\ y e. B) -> E.x(x e. (A i^i (`'R"B)) /\ xRy))
16		elima2 4755	. . . . 5 |- (y e. (R"A) <-> E.x(x e. A /\ xRy))
17	16	anbi1i 676	. . . 4 |- ((y e. (R"A) /\ y e. B) <-> (E.x(x e. A /\ xRy) /\ y e. B))
18		elin 3219	. . . 4 |- (y e. ((R"A) i^i B) <-> (y e. (R"A) /\ y e. B))
19		19.41v 1901	. . . 4 |- (E.x((x e. A /\ xRy) /\ y e. B) <-> (E.x(x e. A /\ xRy) /\ y e. B))
20	17, 18, 19	3bitr4i 268	. . 3 |- (y e. ((R"A) i^i B) <-> E.x((x e. A /\ xRy) /\ y e. B))
21		elima2 4755	. . 3 |- (y e. (R"(A i^i (`'R"B))) <-> E.x(x e. (A i^i (`'R"B)) /\ xRy))
22	15, 20, 21	3imtr4i 257	. 2 |- (y e. ((R"A) i^i B) -> y e. (R"(A i^i (`'R"B))))
23	22	ssriv 3277	1 |- ((R"A) i^i B) C_ (R"(A i^i (`'R"B)))

Syntax hints:   /\ wa 358  E.wex 1541   e. wcel 1710   i^i cin 3208   C_ wss 3257   class class class wbr 4639  "cima 4722  `'ccnv 4771

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-13 1712  ax-14 1714  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334  ax-nin 4078  ax-xp 4079  ax-cnv 4080  ax-1c 4081  ax-sset 4082  ax-si 4083  ax-ins2 4084  ax-ins3 4085  ax-typlower 4086  ax-sn 4087

This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-eu 2208  df-mo 2209  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2478  df-ne 2518  df-ral 2619  df-rex 2620  df-reu 2621  df-rmo 2622  df-rab 2623  df-v 2861  df-sbc 3047  df-nin 3211  df-compl 3212  df-in 3213  df-un 3214  df-dif 3215  df-symdif 3216  df-ss 3259  df-pss 3261  df-nul 3551  df-if 3663  df-pw 3724  df-sn 3741  df-pr 3742  df-uni 3892  df-int 3927  df-opk 4058  df-1c 4136  df-pw1 4137  df-uni1 4138  df-xpk 4185  df-cnvk 4186  df-ins2k 4187  df-ins3k 4188  df-imak 4189  df-cok 4190  df-p6 4191  df-sik 4192  df-ssetk 4193  df-imagek 4194  df-idk 4195  df-iota 4339  df-0c 4377  df-addc 4378  df-nnc 4379  df-fin 4380  df-lefin 4440  df-ltfin 4441  df-ncfin 4442  df-tfin 4443  df-evenfin 4444  df-oddfin 4445  df-sfin 4446  df-spfin 4447  df-phi 4565  df-op 4566  df-proj1 4567  df-proj2 4568  df-opab 4623  df-br 4640  df-ima 4727  df-cnv 4785

This theorem is referenced by: (None)