Theorem 0in 3558

Description: The intersection of the empty set with a class is the empty set. Commuted form of in0 3557. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

Assertion

Ref	Expression
0in	|- ( (/) i^i A ) = (/)

Proof of Theorem 0in

Step	Hyp	Ref	Expression
1		incom 3421	. 2 |- ( (/) i^i A ) = ( A i^i (/) )
2		in0 3557	. 2 |- ( A i^i (/) ) = (/)
3	1, 2	eqtri 2259	1 |- ( (/) i^i A ) = (/)

Syntax hints:   = wceq 1402   i^i cin 3219   (/)c0 3520

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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220

This theorem depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-dif 3222  df-in 3226  df-nul 3521

This theorem is referenced by:  ballotfilemgun  13246  setsfun  13365  setsfun0  13366  restsn  15204