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Theorem rncoss 3348
Description: Range of a composition.
Assertion
Ref Expression
rncoss |- ran ( A o. B) (_ ran A

Proof of Theorem rncoss
StepHypRef Expression
1 dmcoss 3347 . 2 |- dom (`'B o. `'A) (_ dom `' A
2 df-rn 3179 . . 3 |- ran ( A o. B) = dom `'(A o. B)
3 cnvco 3289 . . . 4 |- `'(A o. B) = (`'B o. `'A)
43dmeqi 3301 . . 3 |- dom `'(A o. B) = dom (`'B o. `'A)
52, 4eqtr 1487 . 2 |- ran ( A o. B) = dom (`'B o. `'A)
6 df-rn 3179 . 2 |- ran A = dom `' A
71, 5, 63sstr4 2090 1 |- ran ( A o. B) (_ ran A
Colors of variables: wff set class
Syntax hints:   (_ wss 2037  `'ccnv 3159  dom cdm 3160  ran crn 3161   o. ccom 3164
This theorem is referenced by:  coexg 3510  fco 3621  pjss1co 10002  pj3 10046
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 959  ax-gen 960  ax-8 961  ax-10 963  ax-11 964  ax-12 965  ax-13 966  ax-14 967  ax-17 968  ax-4 970  ax-5o 972  ax-6o 975  ax-9o 1119  ax-10o 1136  ax-16 1206  ax-11o 1213  ax-ext 1452  ax-sep 2693  ax-pow 2732  ax-pr 2769
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 978  df-sb 1168  df-eu 1375  df-mo 1376  df-clab 1457  df-cleq 1462  df-clel 1465  df-ne 1579  df-v 1803  df-dif 2039  df-un 2040  df-in 2041  df-ss 2043  df-nul 2271  df-pw 2392  df-sn 2402  df-pr 2403  df-op 2406  df-br 2610  df-opab 2657  df-cnv 3176  df-co 3177  df-dm 3178  df-rn 3179
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