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Theorem pssned 3601
Description: Proper subclasses are unequal. Deduction form of pssne 3599. (Contributed by David Moews, 1-May-2017.)
Hypothesis
Ref Expression
pssssd.1
Assertion
Ref Expression
pssned

Proof of Theorem pssned
StepHypRef Expression
1 pssssd.1 . 2
2 pssne 3599 . 2
31, 2syl 16 1
Colors of variables: wff setvar class
Syntax hints:  ->wi 4  =/=wne 2652  C.wpss 3476
This theorem is referenced by:  ackbij1lem15  8635  canthnumlem  9047  canthp1lem2  9052  mrieqv2d  15036  slwpss  16632  lsatssn0  34727  islshpcv  34778  lkrpssN  34888
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8
This theorem depends on definitions:  df-bi 185  df-an 371  df-pss 3491
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