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Theorem noxpsgn 13990
Description: The cross product of an ordinal and the singleton of a sign is a surreal.
Hypothesis
Ref Expression
noxpsgn.1 |- X e. {1o, 2o}
Assertion
Ref Expression
noxpsgn |- (A e. On -> (A X. {X}) e. No )

Proof of Theorem noxpsgn
StepHypRef Expression
1 noxpsgn.1 . . . . . 6 |- X e. {1o, 2o}
21elisseti 2301 . . . . 5 |- X e. _V
32fconst 4602 . . . 4 |- (A X. {X}):A-->{X}
42snss 3122 . . . . 5 |- (X e. {1o, 2o} <-> {X} C_ {1o, 2o})
51, 4mpbi 206 . . . 4 |- {X} C_ {1o, 2o}
6 fss 4571 . . . 4 |- (((A X. {X}):A-->{X} /\ {X} C_ {1o, 2o}) -> (A X. {X}):A-->{1o, 2o})
73, 5, 6mp2an 761 . . 3 |- (A X. {X}):A-->{1o, 2o}
8 feq2 4552 . . . 4 |- (x = A -> ((A X. {X}):x-->{1o, 2o} <-> (A X. {X}):A-->{1o, 2o}))
98rcla4ev 2381 . . 3 |- ((A e. On /\ (A X. {X}):A-->{1o, 2o}) -> E.x e. On (A X. {X}):x-->{1o, 2o})
107, 9mpan2 760 . 2 |- (A e. On -> E.x e. On (A X. {X}):x-->{1o, 2o})
11 elno 13987 . 2 |- ((A X. {X}) e. No <-> E.x e. On (A X. {X}):x-->{1o, 2o})
1210, 11sylibr 217 1 |- (A e. On -> (A X. {X}) e. No )
Colors of variables: wff set class
Syntax hints:   -> wi 3   e. wcel 1300  E.wrex 2106   C_ wss 2593  {csn 3044  {cpr 3045  Oncon0 3657   X. cxp 3984  -->wf 3994  1oc1o 5172  2oc2o 5173   No csur 13981
This theorem is referenced by:  noxp1o 13991  noxp2o 13992  axfelem2 14032
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 1304  ax-gen 1305  ax-8 1306  ax-9 1307  ax-10 1308  ax-11 1309  ax-12 1310  ax-13 1311  ax-14 1312  ax-17 1317  ax-4 1319  ax-5o 1321  ax-6o 1324  ax-9o 1481  ax-10o 1500  ax-16 1580  ax-11o 1588  ax-ext 1865  ax-rep 3428  ax-sep 3438  ax-nul 3445  ax-pow 3481  ax-pr 3524  ax-un 3790
This theorem depends on definitions:  df-bi 164  df-or 241  df-an 242  df-ex 1327  df-sb 1536  df-eu 1775  df-mo 1776  df-clab 1872  df-cleq 1877  df-clel 1880  df-ne 2019  df-ral 2109  df-rex 2110  df-v 2294  df-dif 2597  df-un 2600  df-in 2603  df-ss 2605  df-nul 2876  df-pw 3035  df-sn 3049  df-pr 3050  df-op 3053  df-uni 3178  df-br 3339  df-opab 3396  df-id 3586  df-xp 4000  df-rel 4001  df-cnv 4002  df-co 4003  df-dm 4004  df-rn 4005  df-res 4006  df-ima 4007  df-fun 4008  df-fn 4009  df-f 4010  df-no 13984
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