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Theorem psdmrn 8648
Description: The domain and range of a poset equal its field.
Assertion
Ref Expression
psdmrn |- (R e. Poset -> (dom R = U.U.R /\ ran R = U.U.R))

Proof of Theorem psdmrn
StepHypRef Expression
1 ssun1 2193 . . . . 5 |- dom R (_ (dom R u. ran R)
2 dmrnssfld 3357 . . . . 5 |- (dom R u. ran R) (_ U.U.R
31, 2sstri 2073 . . . 4 |- dom R (_ U.U.R
43a1i 8 . . 3 |- (R e. Poset -> dom R (_ U.U.R)
5 pslem 8647 . . . . . . . . . 10 |- (R e. Poset -> ((x e. U.U.R /\ x e. U.U.R /\ x e. U.U.R) -> (((xRx /\ xRx) -> xRx) /\ ((x e. U.U.R -> xRx) /\ ((xRx /\ xRx) -> x = x)))))
6 simprl 414 . . . . . . . . . 10 |- ((((xRx /\ xRx) -> xRx) /\ ((x e. U.U.R -> xRx) /\ ((xRx /\ xRx) -> x = x))) -> (x e. U.U.R -> xRx))
75, 6syl6 22 . . . . . . . . 9 |- (R e. Poset -> ((x e. U.U.R /\ x e. U.U.R /\ x e. U.U.R) -> (x e. U.U.R -> xRx)))
873expd 850 . . . . . . . 8 |- (R e. Poset -> (x e. U.U.R -> (x e. U.U.R -> (x e. U.U.R -> (x e. U.U.R -> xRx)))))
98pm2.43d 65 . . . . . . 7 |- (R e. Poset -> (x e. U.U.R -> (x e. U.U.R -> (x e. U.U.R -> xRx))))
109pm2.43d 65 . . . . . 6 |- (R e. Poset -> (x e. U.U.R -> (x e. U.U.R -> xRx)))
1110pm2.43d 65 . . . . 5 |- (R e. Poset -> (x e. U.U.R -> xRx))
12 visset 1813 . . . . . 6 |- x e. V
1312breldm 3315 . . . . 5 |- (xRx -> x e. dom R)
1411, 13syl6 22 . . . 4 |- (R e. Poset -> (x e. U.U.R -> x e. dom R))
1514ssrdv 2070 . . 3 |- (R e. Poset -> U.U.R (_ dom R)
164, 15eqssd 2079 . 2 |- (R e. Poset -> dom R = U.U.R)
17 ssun2 2194 . . . . 5 |- ran R (_ (dom R u. ran R)
1817, 2sstri 2073 . . . 4 |- ran R (_ U.U.R
1918a1i 8 . . 3 |- (R e. Poset -> ran R (_ U.U.R)
2012, 12brelrn 3344 . . . . 5 |- (xRx -> x e. ran R)
2111, 20syl6 22 . . . 4 |- (R e. Poset -> (x e. U.U.R -> x e. ran R))
2221ssrdv 2070 . . 3 |- (R e. Poset -> U.U.R (_ ran R)
2319, 22eqssd 2079 . 2 |- (R e. Poset -> ran R = U.U.R)
2416, 23jca 288 1 |- (R e. Poset -> (dom R = U.U.R /\ ran R = U.U.R))
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 223   /\ w3a 775   = wceq 956   e. wcel 958   u. cun 2045   (_ wss 2047  U.cuni 2503   class class class wbr 2619  dom cdm 3170  ran crn 3171  Posetcps 8633
This theorem is referenced by:  psref 8649  psrn 8650  spwval 8659  spwnex 8661
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-9 965  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-id 2835  df-xp 3184  df-rel 3185  df-cnv 3186  df-co 3187  df-dm 3188  df-rn 3189  df-res 3190  df-ps 8639
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