Desmos graphing calculator

Yup. It is a calculator that lives in your web browser. and it is absolutely free (at least for now). What do you think of it? See a demo below or try it out now.



Youtube link for smartphones: http://www.youtube.com/watch?feature=player_embedded&v=z5GtcOpGl7Y 

The new TI-Nspire will be eXtra

It will have extra color, have extra battery life, and have extra memory. It will be extra thin, be extra bright, and will be expandable. It is coming this summer. It will be good.

"Will os 3.0 be able to compute non interger factorials? For example entering (3/2)! gives an error saying 'agument must be in a specified domain' but my ti 84 and ti 86 can compute it. Is this fixed in the new os?"

Infinigons, etc.: Is programming the new math?

Infinigons, etc.: Is programming the new math?: "I learned to minimize lectures. Kids (and all people) learn programming by doing. Giving them a few examples to follow and execute on their own is much more effective than parsing code as a class in lecture format (at least with my group, which tended to get squirrelly really quickly)."

Oh and if you ever feel like you don't need programming skills because you will never program anything, do it for your children/students. "If you have any say in this whatsoever, teach your kids programming! (Even if that means you teach yourself programming along the way.)"

A simple survey

Please fill out this opt-in survey form so that Proof seekers has the most accurate and up to date information on you. Thank you for your time. You can take the survey at http://bit.ly/surveykush or point your qr enabled device at the qr code if you'd prefer that.

CEO Friday: Why we don’t hire .NET programmers « Expensify Blog

CEO Friday: Why we don’t hire .NET programmers « Expensify Blog:

"Programming with .NET is like cooking in a McDonalds kitchen. It is full of amazing tools that automate absolutely everything. Just press the right button and follow the beeping lights, and you can churn out flawless 1.6 oz burgers faster than anybody else on the planet.

However, if you need to make a 1.7 oz burger, you simply can’t. There’s no button for it. The patties are pre-formed in the wrong size. They start out frozen so they can’t be smushed up and reformed, and the thawing machine is so tightly integrated with the cooking machine that there’s no way to intercept it between the two. A McDonalds kitchen makes exactly what’s on the McDonalds menu — and does so in an absolutely foolproof fashion. But it can’t go off the menu, and any attempt to bend the machine to your will just breaks it such that it needs to be sent back to the factory for repairs."

Android May Be the Greatest Legal Destruction of Wealth in History

"Imagine if Ford were faced with GM paying people to take Chevrolets? How many would they be able to sell? What if you received $0.10 for every free Pepsi you consumed? Would you still pay $1.50 for a Coke?"

Think about the software industry. What is the cost of writing code? What is the cost of a single copy of the compiled code? I would love to write further about this but the author does such a great job that it just seems a no-brainer to quote him again:

"When software was first imagined as a business, it seemed like a miraculous dream. Because the variable costs were zero, you would make near 100% profit on each incremental unit that you sold. Perhaps the resulting counter-force to this is that if someone can afford to build a near equivalent code base, than they can at their option price to marginal cost ($0.00), the very definition of perfect competition."

Bayesian Inference

Learning about Bayesian probability theory

Bayesian probability theory is a branch of mathematical probability theory that allows one to model uncertainty about the world and outcomes of interest by combining common-sense knowledge and observational evidence.

I've never been good at math gets a chuckle. ...

I quote: 

1. Many people think math is about application. Yet, they do not see how the (higher) math will apply in their everyday activities or careers. 
2. In general, we teach mathematics incorrectly. We treat it as something to memorize and repeat. We don't see mathematics as one of the highest accomplishments of being civilized. We forget that math is more about art than about application. 
3. ... 

The fear and use of mathematics and physics

Please read the article on http://wpgaurav.wordpress.com/2011/02/18/the-fear-and-the-use-of-mathematics-and-physics/ and tell me what you think of it. Thanks. 

The Two Generals Problem

Probability and statistics: Basic concepts

Chapter 1.1 Basic Concepts