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#424 Interpreter code generation failed ←	↑	→ #426 Non-builtin domain values fail

#425 confusion over Category

Edit detail for #425 confusion over Category revision 11 of 13

	1 2 3 4 5 6 7 8 9 10 11 12 13
Editor: Bill Page Time: 2008/05/28 22:34:55 GMT-7
Note: formatting

changed:
-At the conceptual level, OpenAixom thinks of Category as a category.  The
At the conceptual level, OpenAxiom thinks of Category as a category.  The

changed:
- (1) -> Category has Category
- (1) ->
-   (1)  true
-                                                                Type: Boolean
- (2) -> Domain has Category
- (2) ->
-   (2)  true
-                                                                Type: Boolean
- (3) -> Category has Type
- (3) ->
-   (3)  true
-                                                                Type: Boolean
-
 (5) -> Category has Category

   (5)  true
                             Type: Boolean

 (6) -> Domain has Category

   (6)  true
                             Type: Boolean

 (7) -> Category has Type

   (7)  true
                             Type: Boolean

The file algebra/domain.spad.pamphlet contains this definition:

  )abbrev domain CATEGORY Category
  ++ Author: Gabriel Dos Reis
  ++ Date Create: February 16, 2008.
  ++ Date Last Updated: February 16, 2008.
  ++ Basic Operations: coerce
  ...

but OpenAxiom? does not always treat Category this way:

fricas

(1) -> )show Category

   The )show system command is used to display information about types 
      or partial types. For example, )show Integer will show 
      information about Integer .

      Category is not the name of a known type constructor. If you want
      to see information about any operations named Category , issue
                        )display operations Category

fricas

Category

$\label{eq1}\hbox{\axiomType{Category}\ }$

(1)

Type: Variable(Category)

fricas

x:Category

   There are no library operations named Category 
      Use HyperDoc Browse or issue
                              )what op Category
      to learn if there is any operation containing " Category " in its
      name.

   Cannot find a no-argument definition or library operation named 
      Category .

fricas

Category has Category

   There are no library operations named Category 
      Use HyperDoc Browse or issue
                              )what op Category
      to learn if there is any operation containing " Category " in its
      name.

   Cannot find a no-argument definition or library operation named 
      Category .

... --Bill Page, Wed, 28 May 2008 17:13:05 -0700 reply

Axiom Version: => /usr/local/lib/open-axiom/x86_64-unknown-linux/1.2.0-2008-05-25

category regression --gdr, Wed, 28 May 2008 17:55:47 -0700 reply

hat is a regression, because the rest of the compiler and interpreter assumes that Category is conceptually a category -- even when it has a domain implementation.

what? --Bill Page, Wed, 28 May 2008 18:39:35 -0700 reply

gdr wrote:

  Category is conceptually a category -- even when it has a domain implementation

Could you please explain what that means? :-)

... --gdr, Wed, 28 May 2008 20:48:32 -0700 reply

At the conceptual level, OpenAxiom? thinks of Category as a category. The category of categories. However, it has a domain implementation, e.g. as reported by )show. That is just an implementation detail.

domains belong to Category --gdr, Wed, 28 May 2008 22:06:22 -0700 reply

OpenAxiom? trunk as of 2008-05-29 says this:

 (5) -> Category has Category

   (5)  true
                             Type: Boolean

 (6) -> Domain has Category

   (6)  true
                             Type: Boolean

 (7) -> Category has Type

   (7)  true
                             Type: Boolean