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Theorem strsl0 12379
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 4103 . . 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 12352 . 2  |-  ( E `
 (/) )  =  (
(/) `  ( E `  ndx ) )
6 0fv 5515 . 2  |-  ( (/) `  ( E `  ndx ) )  =  (/)
75, 6eqtr2i 2186 1  |-  (/)  =  ( E `  (/) )
Colors of variables: wff set class
Syntax hints:    /\ wa 103    = wceq 1342    e. wcel 2135   (/)c0 3404   ` cfv 5182   NNcn 8848   ndxcnx 12328  Slot cslot 12330
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 604  ax-in2 605  ax-io 699  ax-5 1434  ax-7 1435  ax-gen 1436  ax-ie1 1480  ax-ie2 1481  ax-8 1491  ax-10 1492  ax-11 1493  ax-i12 1494  ax-bndl 1496  ax-4 1497  ax-17 1513  ax-i9 1517  ax-ial 1521  ax-i5r 1522  ax-13 2137  ax-14 2138  ax-ext 2146  ax-sep 4094  ax-nul 4102  ax-pow 4147  ax-pr 4181  ax-un 4405
This theorem depends on definitions:  df-bi 116  df-3an 969  df-tru 1345  df-fal 1348  df-nf 1448  df-sb 1750  df-eu 2016  df-mo 2017  df-clab 2151  df-cleq 2157  df-clel 2160  df-nfc 2295  df-ral 2447  df-rex 2448  df-v 2723  df-sbc 2947  df-dif 3113  df-un 3115  df-in 3117  df-ss 3124  df-nul 3405  df-pw 3555  df-sn 3576  df-pr 3577  df-op 3579  df-uni 3784  df-br 3977  df-opab 4038  df-mpt 4039  df-id 4265  df-xp 4604  df-rel 4605  df-cnv 4606  df-co 4607  df-dm 4608  df-rn 4609  df-iota 5147  df-fun 5184  df-fv 5190  df-slot 12335
This theorem is referenced by:  base0  12380
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