Theorem grpstr

Description: A constructed group is a structure on 1 ... 2 . Depending on hard-coded index values. Use grpstrndx instead. (Contributed by Mario Carneiro, 28-Sep-2013) (Revised by Mario Carneiro, 30-Apr-2015) (New usage is discouraged.)

	Ref	Expression
Hypothesis	grpfn.g	$$⊢G=\left\{⟨{\mathrm{Base}}_{\mathrm{ndx}},B⟩,⟨{+}_{\mathrm{ndx}},\underset{\dot{}}{+}⟩\right\}$$
Assertion	grpstr	$$⊢G\mathrm{Struct}⟨1,2⟩$$

Proof

Step	Hyp	Ref	Expression
1		grpfn.g	$$⊢G=\left\{⟨{\mathrm{Base}}_{\mathrm{ndx}},B⟩,⟨{+}_{\mathrm{ndx}},\underset{\dot{}}{+}⟩\right\}$$
2		df-plusg	$$⊢{+}_{𝑔}=\mathrm{Slot}2$$
3		1lt2	$$⊢1<2$$
4		2nn	$$⊢2\in \mathbb{N}$$
5	1 2 3 4	2strstr	$$⊢G\mathrm{Struct}⟨1,2⟩$$