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Theorem remulcli 7500
Description: Closure law for multiplication of reals. (Contributed by NM, 17-Jan-1997.)
Hypotheses
Ref Expression
recni.1  |-  A  e.  RR
axri.2  |-  B  e.  RR
Assertion
Ref Expression
remulcli  |-  ( A  x.  B )  e.  RR

Proof of Theorem remulcli
StepHypRef Expression
1 recni.1 . 2  |-  A  e.  RR
2 axri.2 . 2  |-  B  e.  RR
3 remulcl 7468 . 2  |-  ( ( A  e.  RR  /\  B  e.  RR )  ->  ( A  x.  B
)  e.  RR )
41, 2, 3mp2an 417 1  |-  ( A  x.  B )  e.  RR
Colors of variables: wff set class
Syntax hints:    e. wcel 1438  (class class class)co 5652   RRcr 7347    x. cmul 7353
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia3 106  ax-mulrcl 7442
This theorem is referenced by:  addltmul  8650  nn0lele2xi  8722  numltc  8900  ef01bndlem  11043  cos2bnd  11047  sin4lt0  11053
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