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Mirrors > Home > MPE Home > Th. List > df-mndo | Structured version Visualization version Unicode version |
Description: A monoid is a semi-group with an identity element. (Contributed by FL, 2-Nov-2009.) (New usage is discouraged.) |
Ref | Expression |
---|---|
df-mndo |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cmndo 26077 |
. 2
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2 | csem 26070 |
. . 3
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3 | cexid 26054 |
. . 3
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4 | 2, 3 | cin 3405 |
. 2
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5 | 1, 4 | wceq 1446 |
1
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Colors of variables: wff setvar class |
This definition is referenced by: mndoissmgrpOLD 26079 mndoisexid 26080 ismndo 26083 |
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