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Definition df-s3 11515
Description: Define the length 3 word constructor. (Contributed by Mario Carneiro, 26-Feb-2016.)
Assertion
Ref Expression
df-s3  |-  <" A B C ">  =  ( <" A B "> concat  <" C "> )

Detailed syntax breakdown of Definition df-s3
StepHypRef Expression
1 cA . . 3  class  A
2 cB . . 3  class  B
3 cC . . 3  class  C
41, 2, 3cs3 11508 . 2  class  <" A B C ">
51, 2cs2 11507 . . 3  class  <" A B ">
63cs1 11421 . . 3  class  <" C ">
7 cconcat 11420 . . 3  class concat
85, 6, 7co 5874 . 2  class  ( <" A B "> concat 
<" C "> )
94, 8wceq 1632 1  wff  <" A B C ">  =  ( <" A B "> concat  <" C "> )
Colors of variables: wff set class
This definition is referenced by:  s3eqd  11529  s3cld  11536  s3cli  11545  s3fv0  11554  s3fv1  11555  s3fv2  11556  s3len  11557  s3co  11564  s1s2  11566  s1s3  11567  s2s2  11572  s4s3  11574  konigsberg  23926  s4prop  28222
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