Description: The value of natural addition. (Contributed by Scott Fenton, 26-Aug-2024)
Ref | Expression | ||
---|---|---|---|
Assertion | naddov | Could not format assertion : No typesetting found for |- ( ( A e. On /\ B e. On ) -> ( A +no B ) = |^| { x e. On | ( ( +no " ( { A } X. B ) ) C_ x /\ ( +no " ( A X. { B } ) ) C_ x ) } ) with typecode |- |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | naddcllem | Could not format ( ( A e. On /\ B e. On ) -> ( ( A +no B ) e. On /\ ( A +no B ) = |^| { x e. On | ( ( +no " ( { A } X. B ) ) C_ x /\ ( +no " ( A X. { B } ) ) C_ x ) } ) ) : No typesetting found for |- ( ( A e. On /\ B e. On ) -> ( ( A +no B ) e. On /\ ( A +no B ) = |^| { x e. On | ( ( +no " ( { A } X. B ) ) C_ x /\ ( +no " ( A X. { B } ) ) C_ x ) } ) ) with typecode |- | |
2 | 1 | simprd | Could not format ( ( A e. On /\ B e. On ) -> ( A +no B ) = |^| { x e. On | ( ( +no " ( { A } X. B ) ) C_ x /\ ( +no " ( A X. { B } ) ) C_ x ) } ) : No typesetting found for |- ( ( A e. On /\ B e. On ) -> ( A +no B ) = |^| { x e. On | ( ( +no " ( { A } X. B ) ) C_ x /\ ( +no " ( A X. { B } ) ) C_ x ) } ) with typecode |- |