Definition df-lm 14880

Description: Define a function on topologies whose value is the convergence relation for sequences into the given topological space. Although f is typically a sequence (a function from an upperset of integers) with values in the topological space, it need not be. Note, however, that the limit property concerns only values at integers, so that the real-valued function ( x e. RR |-> ( sin ` ( pi x. x ) ) ) converges to zero (in the standard topology on the reals) with this definition. (Contributed by NM, 7-Sep-2006.)

Assertion

Ref	Expression
df-lm	|- ~~> t = ( j e. Top |-> { <. f , x >. | ( f e. ( U. j ^pm CC ) /\ x e. U. j /\ A. u e. j ( x e. u -> E. y e. ran ZZ>= ( f |` y ) : y --> u ) ) } )

Distinct variable group:   f, j, x, y, u

Detailed syntax breakdown of Definition df-lm

Step	Hyp	Ref	Expression
1		clm 14877	. 2 class ~~> t
2		vj	. . 3 setvar j
3		ctop 14687	. . 3 class Top
4		vf	. . . . . . 7 setvar f
5	4	cv 1394	. . . . . 6 class f
6	2	cv 1394	. . . . . . . 8 class j
7	6	cuni 3888	. . . . . . 7 class U. j
8		cc 8008	. . . . . . 7 class CC
9		cpm 6804	. . . . . . 7 class ^pm
10	7, 8, 9	co 6007	. . . . . 6 class ( U. j ^pm CC )
11	5, 10	wcel 2200	. . . . 5 wff f e. ( U. j ^pm CC )
12		vx	. . . . . . 7 setvar x
13	12	cv 1394	. . . . . 6 class x
14	13, 7	wcel 2200	. . . . 5 wff x e. U. j
15		vu	. . . . . . . 8 setvar u
16	12, 15	wel 2201	. . . . . . 7 wff x e. u
17		vy	. . . . . . . . . 10 setvar y
18	17	cv 1394	. . . . . . . . 9 class y
19	15	cv 1394	. . . . . . . . 9 class u
20	5, 18	cres 4721	. . . . . . . . 9 class ( f |` y )
21	18, 19, 20	wf 5314	. . . . . . . 8 wff ( f |` y ) : y --> u
22		cuz 9733	. . . . . . . . 9 class ZZ>=
23	22	crn 4720	. . . . . . . 8 class ran ZZ>=
24	21, 17, 23	wrex 2509	. . . . . . 7 wff E. y e. ran ZZ>= ( f |` y ) : y --> u
25	16, 24	wi 4	. . . . . 6 wff ( x e. u -> E. y e. ran ZZ>= ( f |` y ) : y --> u )
26	25, 15, 6	wral 2508	. . . . 5 wff A. u e. j ( x e. u -> E. y e. ran ZZ>= ( f |` y ) : y --> u )
27	11, 14, 26	w3a 1002	. . . 4 wff ( f e. ( U. j ^pm CC ) /\ x e. U. j /\ A. u e. j ( x e. u -> E. y e. ran ZZ>= ( f |` y ) : y --> u ) )
28	27, 4, 12	copab 4144	. . 3 class { <. f , x >. | ( f e. ( U. j ^pm CC ) /\ x e. U. j /\ A. u e. j ( x e. u -> E. y e. ran ZZ>= ( f |` y ) : y --> u ) ) }
29	2, 3, 28	cmpt 4145	. 2 class ( j e. Top |-> { <. f , x >. | ( f e. ( U. j ^pm CC ) /\ x e. U. j /\ A. u e. j ( x e. u -> E. y e. ran ZZ>= ( f |` y ) : y --> u ) ) } )
30	1, 29	wceq 1395	1 wff ~~> t = ( j e. Top |-> { <. f , x >. | ( f e. ( U. j ^pm CC ) /\ x e. U. j /\ A. u e. j ( x e. u -> E. y e. ran ZZ>= ( f |` y ) : y --> u ) ) } )

This definition is referenced by:  lmrel  14881  lmrcl  14882  lmfval  14883