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May
4
comment Construct a non-linear function that shows that the intervals $[2,4]$ and $[10,22]$ have the same cardinality
to answer some homework questions, I guess. This is hardly of any importance.
May
4
answered Construct a non-linear function that shows that the intervals $[2,4]$ and $[10,22]$ have the same cardinality
May
4
comment Prove $\bigcap S$ exists for all $S \ne \emptyset$. Where is the assumption $S \ne \emptyset$ used in the proof?
Which set do you suggest then that $\bigcap \emptyset $ would be?
May
4
answered Why is the inclusion of the $ 0 $-vector part of the definition of a subspace?
May
3
comment Write 100 as the sum of two positive integers
The Bezout coefficients for positive integers are guaranteed to have different signs.
May
3
answered Question about the Range of a sequence
May
3
answered The distance between two sets does not change if closure is taken
May
3
comment What if we change the def of limit as following
because it leads to a different notions, and a useless one in fact.
May
3
answered Why represent a complex number $a+ib$ as $[\begin{smallmatrix}a & -b\\ b & \hphantom{-}a\end{smallmatrix}]$?
May
3
comment Simple dice probability question
how many sides does each dice have? What is the probability of each of the sides of each dice? Without that information it is impossible to answer the question.
May
3
answered Elements and arrows in an abelian category.
May
3
reviewed Reject Intuition: Why is the biconditional true if both statements are false?
May
3
answered Intuition: Why is the biconditional true if both statements are false?
May
2
comment Prove that $L_7$ is a subgroup of $S_7$
You can also note that the identity is not odd.
May
2
revised Why $P( A \cup B) \geq P(B)$?
edited body
May
1
answered Why $P( A \cup B) \geq P(B)$?
May
1
awarded  Nice Answer
Apr
30
answered Why did mathematicians introduce the concept of uniform continuity?
Apr
30
comment Is there a homology theory that counts connected components of a space?
@MarianoSuárez-Alvarez OP states "... [homology theories] being used". So I think a reasonable interpretation of "broad sense" here could mean any homology theory that is actually used (more or less commonly).
Apr
30
awarded  Investor