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Mirrors > Home > NFE Home > Th. List > df-ltc | Unicode version |
Description: Define cardinal less than. Definition from [Rosser] p. 375. (Contributed by Scott Fenton, 24-Feb-2015.) |
Ref | Expression |
---|---|
df-ltc |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cltc 6091 |
. 2
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2 | clec 6090 |
. . 3
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3 | cid 4764 |
. . 3
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4 | 2, 3 | cdif 3207 |
. 2
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5 | 1, 4 | wceq 1642 |
1
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Colors of variables: wff setvar class |
This definition is referenced by: brltc 6115 ltcex 6117 |
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