Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 3338

For question borderline with, or having application to, computer science. Consider also posting http://cs.stackexchange.com/ or http://cstheory.stackexchange.com/ instead of here, if appropriate.

12 votes
3 answers
1k views

The difference between the Recursive and the Effective topos.

I would like to know which is the real difference between the Recursive topos (in the sense of Mulry) and the Effective topos (in the sense of Hyland). Especially what is related to recursive function …
Doctor Gibarian's user avatar
2 votes

The difference between the Recursive and the Effective topos.

As far as I now (correct me if I'm wrong, please): 1 The recursive topos was introduced in "The topos of recursive sets", Thesis, Buffalo, 1980. It is $Rec=Sh_{J}(Set^{M^{op}})$ where: -M is the mo …
Doctor Gibarian's user avatar