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Theorem strsl0 12007
Description: All components of the empty set are empty sets. (Contributed by Stefan O'Rear, 27-Nov-2014.) (Revised by Jim Kingdon, 31-Jan-2023.)
Hypothesis
Ref Expression
strsl0.e  |-  ( E  = Slot  ( E `  ndx )  /\  ( E `  ndx )  e.  NN )
Assertion
Ref Expression
strsl0  |-  (/)  =  ( E `  (/) )

Proof of Theorem strsl0
StepHypRef Expression
1 0ex 4055 . . 3  |-  (/)  e.  _V
2 strsl0.e . . . 4  |-  ( E  = Slot  ( E `  ndx )  /\  ( E `  ndx )  e.  NN )
32simpli 110 . . 3  |-  E  = Slot  ( E `  ndx )
42simpri 112 . . 3  |-  ( E `
 ndx )  e.  NN
51, 3, 4strnfvn 11980 . 2  |-  ( E `
 (/) )  =  (
(/) `  ( E `  ndx ) )
6 0fv 5456 . 2  |-  ( (/) `  ( E `  ndx ) )  =  (/)
75, 6eqtr2i 2161 1  |-  (/)  =  ( E `  (/) )
Colors of variables: wff set class
Syntax hints:    /\ wa 103    = wceq 1331    e. wcel 1480   (/)c0 3363   ` cfv 5123   NNcn 8720   ndxcnx 11956  Slot cslot 11958
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 603  ax-in2 604  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-13 1491  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121  ax-sep 4046  ax-nul 4054  ax-pow 4098  ax-pr 4131  ax-un 4355
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-fal 1337  df-nf 1437  df-sb 1736  df-eu 2002  df-mo 2003  df-clab 2126  df-cleq 2132  df-clel 2135  df-nfc 2270  df-ral 2421  df-rex 2422  df-v 2688  df-sbc 2910  df-dif 3073  df-un 3075  df-in 3077  df-ss 3084  df-nul 3364  df-pw 3512  df-sn 3533  df-pr 3534  df-op 3536  df-uni 3737  df-br 3930  df-opab 3990  df-mpt 3991  df-id 4215  df-xp 4545  df-rel 4546  df-cnv 4547  df-co 4548  df-dm 4549  df-rn 4550  df-iota 5088  df-fun 5125  df-fv 5131  df-slot 11963
This theorem is referenced by:  base0  12008
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