Mathbox for David A. Wheeler |
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Mirrors > Home > ILE Home > Th. List > Mathboxes > walsi | Unicode version |
Description: Extend wff definition to include "all some" applied to a top-level implication, which means is true whenever is true, and there is at least least one where is true. (Contributed by David A. Wheeler, 20-Oct-2018.) |
Ref | Expression |
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wph | |
wps | |
vx |
Ref | Expression |
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walsi | ! |
Colors of variables: wff set class |
Copyright terms: Public domain | W3C validator |