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Mirrors > Home > NFE Home > Th. List > ax4sp1 | Unicode version |
Description: A special case of ax-4 2135 without using ax-4 2135 or ax-17 1616. (Contributed by NM, 13-Jan-2011.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
ax4sp1 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | equidqe 2173 |
. 2
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2 | 1 | pm2.21i 123 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-8 1675 ax-6o 2137 ax-9o 2138 |
This theorem is referenced by: (None) |
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