Mathematics
Profile Activity
Meta user
Network profile
1,454
reputation
1
9
20

Daniel Mak

An idiot who has always been hopeless in maths - this website is a lifesaver for someone like me.

I would like to sincerely thank everyone who has helped me with/answered my questions on MathSE. Your help is really appreciated.

2
answers
103
questions
~34k
people reached
  • Member for 5 years, 9 months
  • 307 profile views
  • Last seen yesterday

Communities (13)

Top network posts

Top tags (36)

Score 2
Posts 36
Posts % 34
Score 2
Posts 29
Score 2
Posts 17
Score 1
Posts 37
Score 1
Posts 6
Score 0
Posts 38
View all tags →

Top posts (105)

All Questions Answers
Votes Newest
9 Proving the inverse of a bijection is bijective Nov 6 '15
6 Questions on how to prove that a set of connectives is NOT functionally complete Jan 31 '18
5 Why is the left-intro rule in Sequent Calculus equivalent to elimination rule in Natural Deduction? May 28 '19
5 Show that if $\langle f,g\rangle=\langle k,h\rangle$ then $f=k$ and $g=h$ Oct 3 '19
4 Show that if $T$ is a Skolem theory in $L$, then $T$ is a Skolem theory in $L'$ Jun 1 '19
4 If $g\circ f$ is monic, so is $f$ Sep 3 '19
4 Confused: examples of homomorphism from $(\Bbb N,+)$ to $(\Bbb Z,+)$ and from $(\Bbb N,<)$ to $(\Bbb Z,<)$ Sep 8 '19
4 Circular definition in proof Jan 20 '16
4 Showing that the union of transitive relations need not be transitive. Sep 28 '16
4 $R=\{ (a,b)\in A\times A\mid{}$ for every $X\subseteq A\smallsetminus\{a,b\}$, if $X \cup \{a\} \in F$ then $X\cup \{b\}\in F\} $ is transitive. Oct 25 '16
View all questions and answers →

Badges (30)

Gold

1

Rarest

Silver

9

Rarest

Bronze

20

Rarest

View all badges →