# Proofathon Calculus Competition

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Greetings, proofathoners! I was recently inducted as a problem writer in the Proofathon contest, and it really is hard work creating quality problems! That's why we would all appreciate it if you could participate in the upcoming Proofathon Calculus Competition!

It starts tomorrow (6/27/2014) at midnight and ends on the 6th of July, 11:59 PM (all EST). So get going, and sign up here!

We look forward to seeing future proofathoners heading our way!

Note by Daniel Liu
7 years, 1 month ago

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

• Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
• Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
• Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
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1. numbered2. list
1. numbered
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Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

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[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$ ... $$ or $ ... $ to ensure proper formatting.
2 \times 3 $2 \times 3$
2^{34} $2^{34}$
a_{i-1} $a_{i-1}$
\frac{2}{3} $\frac{2}{3}$
\sqrt{2} $\sqrt{2}$
\sum_{i=1}^3 $\sum_{i=1}^3$
\sin \theta $\sin \theta$
\boxed{123} $\boxed{123}$

Sort by:

The competition starts today! Good luck to all $\ddot\smile$

- 7 years, 1 month ago

Congratulations Daniel Liu! :)

I am definitely going to participate in this contest.

- 7 years, 1 month ago

I nose 0 Calculus $\ddot \frown$

- 7 years, 1 month ago

you know everything :)

- 7 years, 1 month ago

Are you a mixture of David and Daniel? :D

- 7 years, 1 month ago

Daniel Liu recently got married to David Lee.

- 7 years, 1 month ago

He's David's brother.

- 7 years, 1 month ago

Yeah he my bro (so mean $\ddot \smile$)

- 7 years, 1 month ago

Nice to meet you Daniel Lee. Your little bro is pretty pro. :D

- 7 years, 1 month ago

Daniel won't like that

- 7 years, 1 month ago

Never mind then Daniel your little brother sucks at math. Better? :D

- 7 years, 1 month ago

Why does this have so many upvotes

- 7 years, 1 month ago

Because it's funny :)

Sibling feuds are funny.

- 7 years, 1 month ago

Never been a greater family comedy than sibling feuds. :D

- 7 years, 1 month ago

MWAHAHAHA EDITING MY BROTHER'S POSTS IS AWESOME

btw i edited it and took out the "0"

- 7 years ago

@Daniel Liu , I wanted a clarification regarding question 3 wherein it is asked to obtain the two functions. On integrating, I get some unknown, arbitrary constants for which there isn't any condition to obtain their specific values. So how should I give the answer?

- 7 years, 1 month ago

You may find a specific pair of functions, or a family of possible functions. I'm not sure, since I didn't make the problem, but I think that is what you have to do.

- 7 years, 1 month ago

This is standard in maths competitions, especially in differential (functional) equations. You should say "for some arbitrary constants [blah blah blah...]"

Hope this helps! :)

- 7 years, 1 month ago

@Daniel Liu hI Daniel i have actually never participated in this contest but how good should you be to participate in this contest?

- 7 years, 1 month ago

It doesn't matter! You can still just do the competition for fun. So you have nothing to lose; just join!

- 7 years, 1 month ago

Yeah, you can easily pick off 1 or 2 problems without any Calculus knowledge! $\Tiny \text{[deleted by moderator]}$

- 7 years, 1 month ago

@Finn Hulse why does it say deleted by a moderator

- 7 years, 1 month ago

I do not know.

- 7 years, 1 month ago

In problem 6, do we have an independence assumption of having that property ?

- 7 years, 1 month ago

Yes.

- 7 years, 1 month ago

Please incorporate that into the problem statement.

- 7 years, 1 month ago

Cody replies that it's implied in the problem statement.

- 7 years, 1 month ago

No. The problem only specifies the marginals. There could be potentially many joint distributions that have the same marginals.

- 7 years, 1 month ago

I'm sorry, if you really have an issue with this contact @Cody Johnson about it. He's the one who can edit. I can't really do anything about it :/

- 7 years, 1 month ago

Okay, I'll incorporate it into the problem statement.

- 7 years, 1 month ago

That problem bugs me. $\Tiny \text{[Deleted, No hints please!]}$ but it gave me an obvious and stupid answer. :P

- 7 years, 1 month ago

How did the competition go, everybody?

- 7 years ago

does anyone know why can't I sign up for the Proofathon account? I always encounter error 404 page after clicking sign up button

- 6 years, 7 months ago

- 6 years, 7 months ago

Please keep all posts on-topic! Any off-topic posts will be deleted. @David Lee Please keep this in mind. If too many off-topic posts are made, this thread will be closed.

- 7 years ago

Ahaan, this is a forum for Proofathoners to connect. I think you should be lenient with your moderation. Off-topic comments should be fine.

- 7 years ago