Theorem smgrpismgmOLD 37822

Description: Obsolete version of sgrpmgm 18762 as of 3-Feb-2020. A semigroup is a magma. (Contributed by FL, 2-Nov-2009.) (New usage is discouraged.) (Proof modification is discouraged.)

Assertion

Ref	Expression
smgrpismgmOLD	⊢ (𝐺 ∈ SemiGrp → 𝐺 ∈ Magma)

Proof of Theorem smgrpismgmOLD

Step	Hyp	Ref	Expression
1		elin 3992	. . 3 ⊢ (𝐺 ∈ (Magma ∩ Ass) ↔ (𝐺 ∈ Magma ∧ 𝐺 ∈ Ass))
2	1	simplbi 497	. 2 ⊢ (𝐺 ∈ (Magma ∩ Ass) → 𝐺 ∈ Magma)
3		df-sgrOLD 37821	. 2 ⊢ SemiGrp = (Magma ∩ Ass)
4	2, 3	eleq2s 2862	1 ⊢ (𝐺 ∈ SemiGrp → 𝐺 ∈ Magma)

Syntax hints:   → wi 4   ∈ wcel 2108   ∩ cin 3975  Asscass 37802  Magmacmagm 37808  SemiGrpcsem 37820

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 2110  ax-9 2118  ax-ext 2711

This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1540  df-ex 1778  df-sb 2065  df-clab 2718  df-cleq 2732  df-clel 2819  df-v 3490  df-in 3983  df-sgrOLD 37821

This theorem is referenced by:  mndoismgmOLD  37830