Metamath Proof Explorer


Theorem constrss

Description: Constructed points are in the next generation constructed points. (Contributed by Thierry Arnoux, 25-Jun-2025)

Ref Expression
Hypotheses constr0.1
|- C = rec ( ( s e. _V |-> { x e. CC | ( E. a e. s E. b e. s E. c e. s E. d e. s E. t e. RR E. r e. RR ( x = ( a + ( t x. ( b - a ) ) ) /\ x = ( c + ( r x. ( d - c ) ) ) /\ ( Im ` ( ( * ` ( b - a ) ) x. ( d - c ) ) ) =/= 0 ) \/ E. a e. s E. b e. s E. c e. s E. e e. s E. f e. s E. t e. RR ( x = ( a + ( t x. ( b - a ) ) ) /\ ( abs ` ( x - c ) ) = ( abs ` ( e - f ) ) ) \/ E. a e. s E. b e. s E. c e. s E. d e. s E. e e. s E. f e. s ( a =/= d /\ ( abs ` ( x - a ) ) = ( abs ` ( b - c ) ) /\ ( abs ` ( x - d ) ) = ( abs ` ( e - f ) ) ) ) } ) , { 0 , 1 } )
constrsscn.1
|- ( ph -> N e. On )
Assertion constrss
|- ( ph -> ( C ` N ) C_ ( C ` suc N ) )

Proof

Step Hyp Ref Expression
1 constr0.1
 |-  C = rec ( ( s e. _V |-> { x e. CC | ( E. a e. s E. b e. s E. c e. s E. d e. s E. t e. RR E. r e. RR ( x = ( a + ( t x. ( b - a ) ) ) /\ x = ( c + ( r x. ( d - c ) ) ) /\ ( Im ` ( ( * ` ( b - a ) ) x. ( d - c ) ) ) =/= 0 ) \/ E. a e. s E. b e. s E. c e. s E. e e. s E. f e. s E. t e. RR ( x = ( a + ( t x. ( b - a ) ) ) /\ ( abs ` ( x - c ) ) = ( abs ` ( e - f ) ) ) \/ E. a e. s E. b e. s E. c e. s E. d e. s E. e e. s E. f e. s ( a =/= d /\ ( abs ` ( x - a ) ) = ( abs ` ( b - c ) ) /\ ( abs ` ( x - d ) ) = ( abs ` ( e - f ) ) ) ) } ) , { 0 , 1 } )
2 constrsscn.1
 |-  ( ph -> N e. On )
3 1 2 constr01
 |-  ( ph -> { 0 , 1 } C_ ( C ` N ) )
4 c0ex
 |-  0 e. _V
5 4 prid1
 |-  0 e. { 0 , 1 }
6 5 a1i
 |-  ( ph -> 0 e. { 0 , 1 } )
7 3 6 sseldd
 |-  ( ph -> 0 e. ( C ` N ) )
8 1 2 7 constrsslem
 |-  ( ph -> ( C ` N ) C_ ( C ` suc N ) )