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Mirrors > Home > MPE Home > Th. List > Mathboxes > df-sgrOLD | Structured version Visualization version GIF version |
Description: Obsolete version of df-sgrp 18648 as of 3-Feb-2020. A semigroup is an associative magma. (Contributed by FL, 2-Nov-2009.) (New usage is discouraged.) |
Ref | Expression |
---|---|
df-sgrOLD | ⊢ SemiGrp = (Magma ∩ Ass) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | csem 37231 | . 2 class SemiGrp | |
2 | cmagm 37219 | . . 3 class Magma | |
3 | cass 37213 | . . 3 class Ass | |
4 | 2, 3 | cin 3940 | . 2 class (Magma ∩ Ass) |
5 | 1, 4 | wceq 1533 | 1 wff SemiGrp = (Magma ∩ Ass) |
Colors of variables: wff setvar class |
This definition is referenced by: smgrpismgmOLD 37233 issmgrpOLD 37234 |
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