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Definition df-base 12521
Description: Define the base set (also called underlying set, ground set, carrier set, or carrier) extractor for extensible structures. (Contributed by NM, 4-Sep-2011.) (Revised by Mario Carneiro, 14-Aug-2015.)
Assertion
Ref Expression
df-base  |-  Base  = Slot  1

Detailed syntax breakdown of Definition df-base
StepHypRef Expression
1 cbs 12515 . 2  class  Base
2 c1 7843 . . 3  class  1
32cslot 12514 . 2  class Slot  1
41, 3wceq 1364 1  wff  Base  = Slot  1
Colors of variables: wff set class
This definition is referenced by:  base0  12565  baseval  12568  baseid  12569  basendx  12570  basendxnn  12571  basendxnplusgndx  12639  basendxnmulrndx  12648
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