Theorem dfrn2 2523

Description: Alternate definition of range. Definition 4 of [Suppes] p. 60.

Assertion

Ref	Expression
dfrn2	⊢ ran A = {y∣∃x xAy}

Distinct variable group(s):   x,y,A

Proof of Theorem dfrn2

Step	Hyp	Ref	Expression
1		df-rn 2429	. 2 ⊢ ran A = dom ◡A
2		df-dm 2428	. 2 ⊢ dom ◡A = {y∣∃x y◡Ax}
3		visset 1350	. . . . 5 ⊢ y ∈ V
4		visset 1350	. . . . 5 ⊢ x ∈ V
5	3, 4	brcnv 2519	. . . 4 ⊢ (y◡Ax ↔ xAy)
6	5	biex 733	. . 3 ⊢ (∃x y◡Ax ↔ ∃x xAy)
7	6	biabi 1181	. 2 ⊢ {y∣∃x y◡Ax} = {y∣∃x xAy}
8	1, 2, 7	3eqtr 1123	1 ⊢ ran A = {y∣∃x xAy}

Syntax hints:  ∃wex 678  {cab 1090   = wceq 1091   class class class wbr 2054  ^◡ccnv 2409  dom cdm 2410  ran crn 2411

This theorem is referenced by:  dfrn3 2524  dfdm4 2525  dm0rn0 2549  aceq3lem 3555

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

This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-clab 1093  df-cleq 1097  df-clel 1099  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-br 2063  df-opab 2098  df-cnv 2426  df-dm 2428  df-rn 2429

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