ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  lerelxr Unicode version

Theorem lerelxr 8106
Description: 'Less than or equal' is a relation on extended reals. (Contributed by Mario Carneiro, 28-Apr-2015.)
Assertion
Ref Expression
lerelxr  |-  <_  C_  ( RR*  X.  RR* )

Proof of Theorem lerelxr
StepHypRef Expression
1 df-le 8084 . 2  |-  <_  =  ( ( RR*  X.  RR* )  \  `'  <  )
2 difss 3290 . 2  |-  ( (
RR*  X.  RR* )  \  `'  <  )  C_  ( RR*  X.  RR* )
31, 2eqsstri 3216 1  |-  <_  C_  ( RR*  X.  RR* )
Colors of variables: wff set class
Syntax hints:    \ cdif 3154    C_ wss 3157    X. cxp 4662   `'ccnv 4663   RR*cxr 8077    < clt 8078    <_ cle 8079
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-ext 2178
This theorem depends on definitions:  df-bi 117  df-tru 1367  df-nf 1475  df-sb 1777  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-v 2765  df-dif 3159  df-in 3163  df-ss 3170  df-le 8084
This theorem is referenced by:  lerel  8107  cnfldstr  14190  cnfldle  14199  znval  14268  znle  14269  znbaslemnn  14271
  Copyright terms: Public domain W3C validator