160 reputation
15
bio website
location
age 31
visits member for 1 year, 9 months
seen 2 days ago

Who I am

  • an educator at heart
  • a Haskeller in training
  • a Git repository surgeon
  • a recovering TeX addict
  • a MATLAB survivor, and a recent Julia convert

Where to find me

GitHub account


2d
awarded  Caucus
Dec
15
comment Beginning Haskell - cannot understand proof
Which step(s) do you not understand? If it's the last step of the derivation that you don't understand, you need to substitute $1 - \sin^2 \alpha$ for $\cos^2 \alpha$.
Nov
18
comment How to find a general sum formula for the series: 5+55+555+5555+…?
en.wikipedia.org/wiki/Arithmetico-geometric_sequence
Oct
26
awarded  Curious
Oct
25
revised Back to square 1…
retag
Oct
25
comment Back to square 1…
@hardmath The recurrence in the highest-voted answer to the question you link to doesn't make sense to me; it seems to be backward or something. In particular, we're looking for $f(n)$, not $f(0)$.
Oct
25
revised Back to square 1…
deleted 1049 characters in body
Oct
25
comment Back to square 1…
@hardmath Thanks for the link; I'll give it a read. I've only included my code as a supporting explanation for my reasoning. I don't expect answerers to "debug" it for me. I just want to know where my reasoning is wrong.
Oct
25
comment Back to square 1…
I know that "multiplying an initial vector by the $k$-th power of the transition matrix you will only get the distribution of your state at step $k$". But shouldn't the smallest $k$ such that the probability to be on the last square be $\geq .5$, plus one, be the solution? Your answer is too handwavy... Can you explain why the solution to the toy problem is 13?
Oct
25
revised Back to square 1…
added 1 character in body
Oct
25
asked Back to square 1…
Sep
24
awarded  Autobiographer
Aug
12
comment A question regarding irrational lengths in reality
Side note. Here is a number that is "non-terminating": 0.999999... Do you also have difficulties visualising it? It turns out to be another way to write 1.
Aug
7
suggested rejected edit on How much gas does a car use to carry its own gas?
Jun
26
revised Subtraction by addition
Correct typo in title, minor fixes
Jun
26
suggested approved edit on Subtraction by addition
Jun
21
revised How do you integrate the reciprocal of square root of cosine?
more descriptive title
Jun
21
suggested approved edit on How do you integrate the reciprocal of square root of cosine?
Jun
14
comment How can I prove that a square matrix is invertible if it satisfies this polynomial equation?
@GeoffNaylor That's a very roundabout way of proving invertibility. Brian's answer is more direct.
Jun
14
revised How can I prove that a square matrix is invertible if it satisfies this polynomial equation?
more descriptive title