Definition df-lng 25338

Description: Define the line index extractor for geometries. (Contributed by Thierry Arnoux, 27-Mar-2019.)

Assertion

Ref	Expression
df-lng	⊢ LineG = Slot ;17

Detailed syntax breakdown of Definition df-lng

Step	Hyp	Ref	Expression
1		clng 25336	. 2 class LineG
2		c1 9937	. . . 4 class 1
3		c7 11075	. . . 4 class 7
4	2, 3	cdc 11493	. . 3 class ;17
5	4	cslot 15856	. 2 class Slot ;17
6	1, 5	wceq 1483	1 wff LineG = Slot ;17

This definition is referenced by:  lngndx  25340  lngid  25342