## Search found 6 matches

Thu Jan 13, 2011 9:05 pm UTC
Forum: Religious Wars
Topic: I hate math notation!
Replies: 57
Views: 22120

### Re: I hate math notation!

Seems I'm failing reading comprehension lately.

Again, I apologize for misquoting you, Thesh.
Thu Jan 13, 2011 8:18 pm UTC
Forum: Religious Wars
Topic: I hate math notation!
Replies: 57
Views: 22120

### Re: I hate math notation!

That's where order of operations come in. That statement is equivalent to this (which isn't what was intended): (-b + \sqrt{b^2 - 4ac}) \div 2 \cdot a The equation you are looking for is this: x = {\frac{-b \pm \sqrt{b^2 - 4ac}}{2a}} Which would be this x = (-b + sqrt( b^2 - 4*(a*c))) / (2 ...
Thu Jan 13, 2011 4:53 am UTC
Forum: Mathematics
Topic: Comprehensive Exam Help
Replies: 36
Views: 3231

### Re: Comprehensive Exam Help

314man, your logarithm method fails in part because the function is not continuous at infinity. I am assuming you used something like: If f is continuous at b, then \ln\lim_{x\rightarrow b} f(x)=\lim_{x\rightarrow b} \ln(f(x)) . That wasn't his mistake. His mistake was think...
Thu Jan 13, 2011 3:48 am UTC
Forum: Religious Wars
Topic: I hate math notation!
Replies: 57
Views: 22120

### Re: I hate math notation!

... addition and subtraction have the same priority in the order of operations. They do think that it's equivalent to 3-(2+1) because they think + has a higher precedence over -....[/url] That was my point, but about division and multiplication. Most people would have 6 \div 2 * 3=9 (i.e. just work...
Wed Jan 12, 2011 1:57 am UTC
Forum: Mathematics
Replies: 185
Views: 266741

http://www.math.ksu.edu/~pinner/RevisedHeilbronn3.pdf
Published in Journal of Number Theory Volume 125, Issue 2, August 2007, Pages 289-297. This gives me Erdős 3 via Pinner.

http://www.nsc.ru/EMIS/journals/INTEGERS/papers/j34/j34.pdf
Published in INTEGERS 9 (2009), 435-440.
Wed Jan 12, 2011 1:44 am UTC
Forum: Religious Wars
Topic: I hate math notation!
Replies: 57
Views: 22120

### Re: I hate math notation!

No. Your example is why I hate maths not written as maths. Your psuedocode is ambiguous (and also has redundant brackets). Does (-b + sqrt( b^2 - 4*(a*c))) / 2 * a mean {\frac{-b + \sqrt{b^2 - 4ac}}{2a}} or does it mean {\frac{-b + \sqrt{b^2 - 4ac}}{2}}a They will give very different results. That'...