Metamath Proof Explorer


Theorem dpval3

Description: Value of the decimal point construct. (Contributed by Thierry Arnoux, 16-Dec-2021)

Ref Expression
Hypotheses dpval2.a A 0
dpval2.b B
Assertion dpval3 Could not format assertion : No typesetting found for |- ( A . B ) = _ A B with typecode |-

Proof

Step Hyp Ref Expression
1 dpval2.a A 0
2 dpval2.b B
3 1 2 dpval2 A . B = A + B 10
4 df-dp2 Could not format _ A B = ( A + ( B / ; 1 0 ) ) : No typesetting found for |- _ A B = ( A + ( B / ; 1 0 ) ) with typecode |-
5 3 4 eqtr4i Could not format ( A . B ) = _ A B : No typesetting found for |- ( A . B ) = _ A B with typecode |-