9
votes
1answer
92 views

Why does $Failed have attribute HoldAll?

Why does $Failed have attribute HoldAll? Are there typical situations where $Failed is ...
5
votes
1answer
121 views

Strange Behavior when making Equal Listable in Pick

While trying to make this problem more efficient I tried different methods and dabbled with making Greater and Equal ...
7
votes
1answer
153 views

The Flat Attribute, Unevaluated and the Evaluation Process

To make this question easy to follow let's give some symbols a couple attributes. Attributes[f] = {Flat}; Attributes[s] = {Orderless}; Now consider the ...
23
votes
2answers
759 views

Block attributes of Equal

I answered “Equating matrices (or higher order tensors) element-wise” with: ...
21
votes
1answer
592 views

How do you set attributes on SubValues?

SubValues, as discussed in a previous question, are declared as follows ...