Thank you for reading it. I know I made a lot of mistakes. This is my first ever proof that I have attempted. Another note is that I only have been studying proofs for about a week. Any advice will be helpful.
prove: $|x+y| ≤ |x| + |y|$
Case 1: As values of x and y are randomly assigned negativ...
My question is more practically understood by example. I need a set A that behaves like the one below:
Set A: {1,3,5}
Set B (all subsets of A): {1}, {3}, {5}, {1,3}, {1,5}, {3,5}, {1,3,5}
Set C (summations of each element of B): {1}, {3}, {5}, {4}, {6}, {8}, {9}
Because every element of C is ...
No tag wiki. This word has several meaning in mathematics.
Wasn't tag like this discussed before?
I only found mention of this name for tag in this post.
Asaf writes there: To drive the point home, consider the tag "regularity" in which every question about objects which can be called "regular" fits. That's an extremely bad tagging philosophy.
I have also pinged the tag creator:
I see you have created (regularity). When you create a tag, it is good to create also tag-wiki or at least tag-excerpt to indicate what you intend the tag to be used for. In this particular case, regularity has several meanings in mathematics. If you wish to discuss this further, feel free to drop a line in chat. — Martin Sleziak20 secs ago
The tag-wiki created by the same user, who created a tag, is in suggested edits queue at the moment.
@MartinSleziak I created a tag excerpt as you suggested. However, you said regularity has several meanings in math. My description of regularity focused on PDEs, so I may be biased. Please add your edits if you can or need. — le gâteau au fromage3 mins ago
The question is, whether we want a tag with this name. Or whether it should be renamed to something like regularity-pde.
It seems that there are many notions in mathematics with regular/regularity in the name.
Thanks for creating tag-excerpt. I have posted a question on meta about this tag. Hopefully, some people knowledgeable about PDEs will tell us their opinion on utility of this tag. — Martin Sleziak58 secs ago
Quite recently a tag called regularity has been created. The tag-excerpt says:
The concept of regularity concerns the smoothness of weak solutions to a partial differential equations.
At the moment the tag contains 4 questions 1, 2, 3, 4, all of them are about PDEs.
However there are many ...
My question is more practically understood by example. I need a set A that behaves like the one below:
Set A: {1,3,5}
Set B (all subsets of A): {1}, {3}, {5}, {1,3}, {1,5}, {3,5}, {1,3,5}
Set C (summations of each element of B): {1}, {3}, {5}, {4}, {6}, {8}, {9}
Because every element of C is ...
Quite recently a tag called regularity has been created. The tag-excerpt says:
The concept of regularity concerns the smoothness of weak solutions to a partial differential equations.
At the moment the tag contains 4 questions 1, 2, 3, 4, all of them are about PDEs.
However there are many ...
