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visits member for 4 years, 2 months
seen Dec 15 at 14:28

Sep
4
comment Having hard time understanding proofs by contradiction.
Hm, it looks like I need to study this some more ...
Sep
2
awarded  Excavator
Sep
2
revised How big are transitively reduced graphs?
typo fix; 'the' added
Sep
2
suggested approved edit on How big are transitively reduced graphs?
Sep
2
comment Having hard time understanding proofs by contradiction.
Rest assured: you are not alone. Whole branches of mathematics exist that reject proofs by contradiction as nonsensical!
Sep
30
awarded  Critic
Sep
12
comment Blue eyes: a logic puzzle
@aufkag: ouch. sorry
Sep
12
comment Blue eyes: a logic puzzle
@aufkag: Your question 2 shows how hard it is to formulate such puzzles clearly. The description makes it clear to me that the islanders do not know in advance how many of them have blue eyes; but it doesn't to you, apparently.
Jul
9
comment Is it possible to have multiple decimal points in a number?
This system isn't decimal, though. Old British currency notation (£2 9s 11d) is another example.
Jun
14
comment My sister absolutely refuses to learn math
@jwg: The relevance is clear to me: automating tricks and using real comprehension are superficially similar, but quite different underneath, not only in how they work but also in how well they work on problems: the automated trick master can solve specific types very quickly but is stumped when it comes to nonstandard ones.
Nov
27
revised Puzzle: Dropping balls along the way
a title must contain some sort of description of the problem
Nov
27
suggested approved edit on Puzzle: Dropping balls along the way
Nov
8
awarded  Teacher
Nov
8
revised How big are transitively reduced graphs?
remove duplicate term
Nov
8
answered Optimizing response times of an ambulance corp: short-term versus average
Oct
1
comment How big are transitively reduced graphs?
Very insightful, thank you! This proves that bipartite graphs are the largest (which is what I wanted to know) but not that there aren't any other largest graphs.
Oct
1
accepted How big are transitively reduced graphs?
Oct
1
awarded  Scholar
Oct
1
awarded  Supporter
Oct
1
comment How big are transitively reduced graphs?
Perfect. Thank you!