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user253751
user253751
01:18
@raoof return "1" if U(self) returns a blank tape or a blank tape if U(self) doesn't return a blank tape?
raoof
raoof
02:15
@user253751 how do you test to see the tape is blank ?
if you mean something like
G()=if U(G) then G() else 1
that does not work because "if blank" runs forever
 
11 hours later…
user253751
user253751
13:29
what do YOU mean when you say the tape is blank?
 
2 hours later…
raoof
raoof
15:07
@user253751 blank tape means there is no symbol written on the tape
user253751
user253751
15:18
@raoof so what symbol is there?
raoof
raoof
there is no symbol the tape is blank
let suppose U tape alphabet is {b,1} then you write a binary strings of 1 and blank symbols on the tape and start the machine
 
6 hours later…
user253751
user253751
21:20
so the output tape of U(m) is filled with b if m doesn't halt?

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