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Theorem 2ssom 6691
Description: The ordinal 2 is included in the set of natural number ordinals. (Contributed by BJ, 5-Aug-2024.)
Assertion
Ref Expression
2ssom 2o ⊆ ω

Proof of Theorem 2ssom
StepHypRef Expression
1 2onn 6688 . 2 2o ∈ ω
2 elomssom 4703 . 2 (2o ∈ ω → 2o ⊆ ω)
31, 2ax-mp 5 1 2o ⊆ ω
Colors of variables: wff set class
Syntax hints:  wcel 2202  wss 3200  ωcom 4688  2oc2o 6575
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 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-iinf 4686
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-uni 3894  df-int 3929  df-suc 4468  df-iom 4689  df-1o 6581  df-2o 6582
This theorem is referenced by:  nninfwlporlemd  7370  nninfwlporlem  7371  nninfwlpoimlemg  7373  nninfwlpoimlemginf  7374  nninfctlemfo  12610  bj-charfunbi  16406  2omap  16594
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