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Theorem 1t1e1ALT 12294
Description: Alternate proof of 1t1e1 12405 using a different set of axioms (add ax-mulrcl 11166, ax-i2m1 11171, ax-1ne0 11172, ax-rrecex 11175 and remove ax-resscn 11160, ax-mulcom 11167, ax-mulass 11169, ax-distr 11170). (Contributed by Steven Nguyen, 20-Sep-2022.) (Proof modification is discouraged.) (New usage is discouraged.)
Assertion
Ref Expression
1t1e1ALT (1 · 1) = 1

Proof of Theorem 1t1e1ALT
StepHypRef Expression
1 1re 11211 . 2 1 ∈ ℝ
2 ax-1rid 11173 . 2 (1 ∈ ℝ → (1 · 1) = 1)
31, 2ax-mp 5 1 (1 · 1) = 1
Colors of variables: wff setvar class
Syntax hints:   = wceq 1568  wcel 2150  (class class class)co 7414  cr 11102  1c1 11104   · cmul 11108
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2152  ax-9 2160  ax-ext 2742  ax-1cn 11161  ax-icn 11162  ax-addcl 11163  ax-mulcl 11165  ax-mulrcl 11166  ax-i2m1 11171  ax-1ne0 11172  ax-1rid 11173  ax-rrecex 11175  ax-cnre 11176
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-sb 2099  df-clab 2749  df-cleq 2762  df-clel 2845  df-ne 2966  df-ral 3087  df-rex 3097  df-rab 3424  df-v 3464  df-dif 3916  df-un 3918  df-ss 3930  df-nul 4295  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-br 5115  df-iota 6496  df-fv 6548  df-ov 7417
This theorem is referenced by:  nnmul1com  12296  remulinvcom  43144  sn-0tie0  43175
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