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896 posts tagged with math.

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## Help my fiancee find some math related work

My fiancee needs some work, preferably from home. Math background, no telephone calling. Any leads? [more inside]

## Avoiding the "summer slide"

Primary school gets out tomorrow. I know it is common for kids to have a "summer slide" where they forget a lot of what they've learned over the year. Recommend some fun math and science sites/projects/activities for elementary school age kids that will keep them refreshed and interested. [more inside]

## Hidden Markov Models for idiots?

Biologist needs recommendations on where to start learning the basics of HMMs. [more inside]

## Graduation gift for a math and geology nerd

I'm looking for a graduation gift for a math and geology nerd. My best friend just got dual bachelor's degrees. She's going to grad school for geophysics in the fall. I know approximately zero about her areas of study and would like to get her something nice. [more inside]

## Being able to point out the idiocy of math tattoos

How do I pick up mathematics...as an amateur hobby? [more inside]

## Does this tattoo equation mean to you what I mean it to?

Math and science geeks, does this fake equation make sense? 'delta' = c ... meaning "change is constant". [more inside]

## How do I learn math for CLEP?

Help me learn math for my CLEP test, please. [more inside]

## What statistical analysis of historical prices would be useful for a buyer?

What statistical analysis of historical prices would be useful for a buyer? [more inside]

## cool math-y gifts?

I'm looking for an awesome, tactile, mathy gift for a friend of mine. Suggestions? [more inside]

## Is this math impossible?

I do not know math. I have a number, and I want to backwards engineer that number so I can arrive at it by adding some unknown amount and 13% of that unknown amount. Is there any way to figure this out besides trial and error?

## Did Anyone Invent Some New Math Stuff So They Could Solve A Problem Which Then Lead To a Technological Breakthrough?

Can you cite any examples where a technological breakthrough wasn't possible until there was some sort of mathematical breakthrough? [more inside]

## From teaching to tech - updating resume and skills

I have a Master's in math, and would like to get a job in the tech industry or a laboratory, but my resume is very teaching-oriented. I would like tips on retooling it to make myself more attractive. I also have several months to improve my skills. [more inside]

## Lengthening your horizons.

How close is the horizon on the moon? On Mercury? On Mars? [more inside]

## How can I calculate a month/date delta?

Calendar math question: today is March 25, 2011. I found my old watch in a drawer and the time is still correct, but the watch date window says 13. Assuming the date window repeats 1 to 31 and that I always 'set' my watch correctly, what was the most recent month and year that I could have worn it? [more inside]

## math

Stupid math question:
How to solve (not trail and error) a problem set up like:
2x*3y=278
if
x+y=119
I am not sure what to call this type of problem so can not effectively google the steps. Not looking for an answer (per se) of the above problem, but the steps taken to solve it. [more inside]

## An infinite debate?

Got into a debate with a friend regarding a math question - I think our debate reflects his misapplication of finite math reasoning to infinities, but I'm having trouble dredging up what I learned in set theory 10 years ago. Imagine you have a bag that has all of the real numbers from 0 to 2, let's say. What are the odds that if you reach into the bag you pull out a number between 0 and 1.5 ? 75%? 50%? Why? Depending on the answer to this I may have followup questions, but I'll leave it here for now. [more inside]

## "New" math?

Multiple students taking an exam at different times come up with the same baffling answer. Help! [more inside]

## What length to cut pipes for a xylophone?

Need help with some math: figuring out pipe lengths for a xylophone for my daughter's school project. [more inside]

## What the heck is an imaginary exponent?

## Strong Induction

Hey all, just a real quick discrete math induction question inside for anyone willing to help, thanks. [more inside]

## How to find focal length from image magnification % ?

Math/Optics: How can I derive the focal length of a lens from the magnification percentage of an image? [more inside]

## How to be analytically creative?

I have a poetic, creative, intuitive brain. I feel out of my element talking to programmers, mathematicians, and physicists, yet I find their ideas aesthetically intriguing and I want to understand them. [more inside]

## math finance text?

Any recommendations for a good graduate level text book for an introduction to mathematical finance course? [more inside]

## Pie is greater than not pie.

I'm trying to express my love for a certain dessert in a math/logic formula.
I have this:

**π > ∼π**, which I take to mean "Pi is greater than not Pi", and this:**π > ∞-π**, which I take to mean "Pi is greater than Everything but Pi". Do these make any sense or hold up in any legit way?## Game Theory Post Grad studies

Post grad studies in Game Theory? Which universities have a focus in Game Theory? Are there Masters available for this?
Sorry for the grunt like presentation to my question. I just thought the abbreviated style would be best for a summary review of what I'm looking for.
Thanks!

## How to manipulate "12 = x - (square root of x)" into "x="

The solution to 12 = x - (square root of x) is 16, but how do I manipulate the equation to show that? [more inside]

## WidgetFilter

If I know the number of widgets, number of days, and total budget, can I break down a per widget price? [more inside]

## How much extra salt?

Chemistry, math nerds, and smart people please help me with this cooking question involving salt. [more inside]

## Should I pursue my interest and study college physics more?

Should I pursue my interest and study college physics more? Specifically, should I take a year-long calculus-based program, until I get comfortable that I'm on top of it-- and can really judge my level of interest and aptitude fairly?
Considering I'm a Junior English major. Also considering that it's been 15 years since HS algebra and I've never been good at math. But I want to be. [more inside]

## I Need All the Help Ever: Calculus Edition

Help me arm myself for a future-determining showdown with calculus. [more inside]

## not that marriage theorem, another one

A friend in college once mentioned a theorem for deciding the number of people to meet before deciding on the person to marry. Was it just a joke, or is there really such a theorem? [more inside]

## Like two peas in a pot

Mathfilter: Antiderivative explained? [more inside]

## publisher reputation

if I'm looking through a library... does being published with Springer Verglag mean that the research is legit, and does being published with Nova Publishers mean that it isn't?

## Math and Crime

I've been asked to teach a week at a summer university. Help me to design the most awesome computer science/discrete math course ever. [more inside]

## What kind of graph plot am I looking for?

I have a series of tables describing a set of data and their values for certain points in time. I want to create a multi-line chart from this data so I can see the growth curves. Is there a name for this kind of plot? It must be a solved problem and some tools to do this but I can't google for it if I don't know the name of what I want. [more inside]

## calling math/chem geniuses

When doing mixed-operation arithmetic keeping significant figures, do you round after each operation- according to the rules for that particular step? Or do you keep everything in long-form calculator numbers, then round at the final answer? [more inside]

## Sloppy Calculus

Please help me evaluate integrals more accurately. Sloppy calculus is killing me. [more inside]

## Never been near a university, never took a paper or a learned degree.

Why should I study math? [more inside]

## Straightforward Dice Probability

Please refresh my memory with regard to a straightforward question of fair dice and probability. [more inside]

## Ah! Real, living story problems!

Math Filter: I am trying to find a name for this equation. I am not sure if I can solve it given the information that I currently have. [more inside]

## Infinite Economics

Do the economics in Nick Spencer and Christian Ward's

*Infinite Vacation*make sense? Are supply and demand meaningless concepts when an infinite multiverse is brought into the picture? [more inside]## Ghostly miasma and morass: aka basic math proofs

Can someone give me some insight as to how to approach and make sense of mathermatical proofs? [more inside]

## Math skills for 300-level statistics?

I'm about to start a 300-level Statistics course, but my math skills are very rusty. How can I quickly rejuvenate my old skills? [more inside]

## I don't get it.

Please explain this mathematics joke to me. [more inside]

## How to ace every math class I ever take

I just failed my math class (a finance class). I'm smart at math but I don't handle organization well for math-related classes. How can I handle them classes better? [more inside]

## How to count a cribbage hand.

Counting-Filter: A friend once asked me how many points the entire 52-card deck is worth in the game of Cribbage...not that you could actually be dealt the whole deck, but just a curiosity. [more inside]

## Quantitative finance jobs for a pure mathematician

I'm a pure mathematician with a Ph.D. and I'm currently a visiting professor at a large state university. However, I'm looking to switch gears and get into the quantitative finance field. The problem is that I don't know anything at all about finance. I know that there are companies such as D. E. Shaw that hire mathematicians that don't have financial experience; what other companies should I look at? Is there any general advice you'd give someone in my position? Also, I have my Ph.D. from a well-regarded state school, but I'm not an Ivy-leaguer; does that put me at a disadvantage?

## Dyscalculia and logic class

I have a learning disability (dyscalculia/mathematics disorder). Could I handle the formal language component of an undergrad Introduction to Logic class? [more inside]

## When do I look for non-academic jobs?

When do I look for non-academic jobs if I'm trying to transition out of academia, and which jobs do I look for? (I have a math PhD.) [more inside]

## Recommend me a book on Cryptography/Cryptanalysis!

I get to teach myself Cryptography for a class, please help me pick my book! [more inside]