Theorem s7cli

Description: A length 7 string is a word. (Contributed by Mario Carneiro, 26-Feb-2016)

	Ref	Expression
Assertion	s7cli	$$⊢⟨“ABCDEFG”⟩\in \mathrm{Word}\mathrm{V}$$

Proof

Step	Hyp	Ref	Expression
1		df-s7	$$⊢⟨“ABCDEFG”⟩=⟨“ABCDEF”⟩\mathrm{++}⟨“G”⟩$$
2		s6cli	$$⊢⟨“ABCDEF”⟩\in \mathrm{Word}\mathrm{V}$$
3	1 2	cats1cli	$$⊢⟨“ABCDEFG”⟩\in \mathrm{Word}\mathrm{V}$$