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Definition df-icc 9852
Description: Define the set of closed intervals of extended reals. (Contributed by NM, 24-Dec-2006.)
Assertion
Ref Expression
df-icc  |-  [,]  =  ( x  e.  RR* ,  y  e.  RR*  |->  { z  e.  RR*  |  (
x  <_  z  /\  z  <_  y ) } )
Distinct variable group:    x, y, z

Detailed syntax breakdown of Definition df-icc
StepHypRef Expression
1 cicc 9848 . 2  class  [,]
2 vx . . 3  setvar  x
3 vy . . 3  setvar  y
4 cxr 7953 . . 3  class  RR*
52cv 1347 . . . . . 6  class  x
6 vz . . . . . . 7  setvar  z
76cv 1347 . . . . . 6  class  z
8 cle 7955 . . . . . 6  class  <_
95, 7, 8wbr 3989 . . . . 5  wff  x  <_ 
z
103cv 1347 . . . . . 6  class  y
117, 10, 8wbr 3989 . . . . 5  wff  z  <_ 
y
129, 11wa 103 . . . 4  wff  ( x  <_  z  /\  z  <_  y )
1312, 6, 4crab 2452 . . 3  class  { z  e.  RR*  |  (
x  <_  z  /\  z  <_  y ) }
142, 3, 4, 4, 13cmpo 5855 . 2  class  ( x  e.  RR* ,  y  e. 
RR*  |->  { z  e. 
RR*  |  ( x  <_  z  /\  z  <_ 
y ) } )
151, 14wceq 1348 1  wff  [,]  =  ( x  e.  RR* ,  y  e.  RR*  |->  { z  e.  RR*  |  (
x  <_  z  /\  z  <_  y ) } )
Colors of variables: wff set class
This definition is referenced by:  iccval  9877  elicc1  9881  iccss  9898  iccssioo  9899  iccss2  9901  iccssico  9902  iccssxr  9913  ioossicc  9916  icossicc  9917  iocssicc  9918  iccf  9929  ioodisj  9950
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