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Syntax Definition wvhc4 38813
Description: Syntax for a 4-element virtual hypotheses collection. (Contributed by Alan Sare, 17-Oct-2017.) (New usage is discouraged.)
Hypotheses
Ref Expression
wph wff ph
wps wff ps
wch wff ch
wth wff th
Assertion
Ref Expression
wvhc4 wff (. ph ,. ps ,. ch ,. th ).
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