user avatar
user avatar
user avatar
committedandroider
  • Member for 7 years, 9 months
  • Last seen more than a month ago
12 votes
6 answers
56k views

Is empty set element of every set if it is subset of every set?

10 votes
4 answers
17k views

How can I complete this proof by contradiction?

6 votes
2 answers
432 views

Is this expression even a function?

5 votes
1 answer
22k views

In this situation, based on order of operations, would cross product happen first or dot product?

5 votes
2 answers
4k views

Difference between "necessary" and "necessary but not sufficient"? [duplicate]

3 votes
1 answer
3k views

How to adapt proof by contradiction showing that a sqrt(2) is irrational for sqrt(20)?

3 votes
1 answer
88 views

Would this be an acceptable translation of the English statement as well?

3 votes
2 answers
2k views

What does this symbol mean?

3 votes
1 answer
99 views

Next step to reach the contradiction?

3 votes
2 answers
2k views

Next step to take to reach the contradiction?

3 votes
2 answers
4k views

How to determine which amounts of postage can be formed by using just 4 cent and 11 cent stamps? [duplicate]

3 votes
1 answer
1k views

Can someone verify my answers to these questions regarding this poset?

3 votes
0 answers
154 views

Why is this not a poset after adding zero?

3 votes
1 answer
963 views

How to show that recurrence $T(n) \in \Omega(n^{0.5})$ using proof by induction?

3 votes
2 answers
749 views

How to find a function that is the upper bound of this sum?

3 votes
3 answers
861 views

Wouldn't each addition take time $O(n)$?

3 votes
1 answer
654 views

Is this the correct minimum number of coins needed to make change?

2 votes
1 answer
345 views

Wouldn't this Greedy Algorithm achieve the highest possible of money in this situation?

2 votes
2 answers
490 views

Can a relation from A to some other set B also be considered symmetric?

2 votes
2 answers
4k views

How to prove what amounts of postage can be formed with normal mathematical induction?

2 votes
2 answers
294 views

Why does a set of m elements have 2$^m$ subsets?

2 votes
1 answer
298 views

What is the error in this proof?

2 votes
1 answer
268 views

How do you prove this linear algebra matrix equality?

2 votes
2 answers
1k views

How to start proving $A \times B \times C \ne (A \times B) \times C$?

2 votes
1 answer
807 views

Why is this not a function?

2 votes
3 answers
20k views

Can someone verify my direct proof that if $A$ is a subset of $B$, $A\cup B = B$?

2 votes
3 answers
4k views

How would the intersection of two uncountable sets be finite?

2 votes
3 answers
2k views

How would the intersection of two uncountable sets form a countably infinite set?

2 votes
1 answer
2k views

How to tell the difference between interval and coordinate notation from context?

2 votes
4 answers
191 views

Clarifying on how if p,q is logically equivalent to p only if q [duplicate]