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Theorem nn2m 8504
Description: Multiply an element of ω by 2o. (Contributed by Scott Fenton, 16-Apr-2012.) (Revised by Mario Carneiro, 17-Nov-2014.)
Assertion
Ref Expression
nn2m (𝐴 ∈ ω → (2o ·o 𝐴) = (𝐴 +o 𝐴))

Proof of Theorem nn2m
StepHypRef Expression
1 2onn 8492 . . 3 2o ∈ ω
2 nnmcom 8477 . . 3 ((2o ∈ ω ∧ 𝐴 ∈ ω) → (2o ·o 𝐴) = (𝐴 ·o 2o))
31, 2mpan 686 . 2 (𝐴 ∈ ω → (2o ·o 𝐴) = (𝐴 ·o 2o))
4 nnm2 8503 . 2 (𝐴 ∈ ω → (𝐴 ·o 2o) = (𝐴 +o 𝐴))
53, 4eqtrd 2773 1 (𝐴 ∈ ω → (2o ·o 𝐴) = (𝐴 +o 𝐴))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1537  wcel 2101  (class class class)co 7295  ωcom 7732  2oc2o 8311   +o coa 8314   ·o comu 8315
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2103  ax-9 2111  ax-10 2132  ax-11 2149  ax-12 2166  ax-ext 2704  ax-sep 5226  ax-nul 5233  ax-pr 5355  ax-un 7608
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3or 1086  df-3an 1087  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2063  df-mo 2535  df-eu 2564  df-clab 2711  df-cleq 2725  df-clel 2811  df-nfc 2884  df-ne 2939  df-ral 3060  df-rex 3069  df-reu 3223  df-rab 3224  df-v 3436  df-sbc 3719  df-csb 3835  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-pss 3908  df-nul 4260  df-if 4463  df-pw 4538  df-sn 4565  df-pr 4567  df-op 4571  df-uni 4842  df-iun 4929  df-br 5078  df-opab 5140  df-mpt 5161  df-tr 5195  df-id 5491  df-eprel 5497  df-po 5505  df-so 5506  df-fr 5546  df-we 5548  df-xp 5597  df-rel 5598  df-cnv 5599  df-co 5600  df-dm 5601  df-rn 5602  df-res 5603  df-ima 5604  df-pred 6206  df-ord 6273  df-on 6274  df-lim 6275  df-suc 6276  df-iota 6399  df-fun 6449  df-fn 6450  df-f 6451  df-f1 6452  df-fo 6453  df-f1o 6454  df-fv 6455  df-ov 7298  df-oprab 7299  df-mpo 7300  df-om 7733  df-2nd 7852  df-frecs 8117  df-wrecs 8148  df-recs 8222  df-rdg 8261  df-1o 8317  df-2o 8318  df-oadd 8321  df-omul 8322
This theorem is referenced by: (None)
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