Category Archives: Maxima

Maxima on Android

Such a long long time since I last posted!  Very poor blogging etiquette.  Anyway, to break the drought, here’s news of the best thing to come my way in the last six months – fully featured Maxima running on Android

Maxima on Android

Such a long long time since I last posted!  Very poor blogging etiquette.  Anyway, to break the drought, here’s news of the best thing to come my way in the last six months – fully featured Maxima running on Android

A piecewise polynomial approximation to the normal CDF

The normal cumulative distribution function has the unfortunate property of not being expressible in terms of elementary functions; that is, it can’t be computed with functions available on a standard scientific calculator. Some modern calculators, such as the Casio ClassPad

A piecewise polynomial approximation to the normal CDF

The normal cumulative distribution function has the unfortunate property of not being expressible in terms of elementary functions; that is, it can’t be computed with functions available on a standard scientific calculator. Some modern calculators, such as the Casio ClassPad

Easy Lagrangian interpolation

As everybody knows, the formula for Lagrangian interpolation though points , where all the values are distinct, is given by It is easy to see that this works, as the product is equal to zero if and is equal to

Easy Lagrangian interpolation

As everybody knows, the formula for Lagrangian interpolation though points , where all the values are distinct, is given by It is easy to see that this works, as the product is equal to zero if and is equal to

Symbolic integration with an open source CAS

When I use Maple with my first year students, and we are experimenting with integration, I challenge them to produce a function which Maple can’t integrate in closed form. Given the huge number of special functions in Maple, and my

Symbolic integration with an open source CAS

When I use Maple with my first year students, and we are experimenting with integration, I challenge them to produce a function which Maple can’t integrate in closed form. Given the huge number of special functions in Maple, and my

The Digital Signature Algorithm in Maxima and Sage

The Digital Signature Algorithm, also known as the Digital Signature Standard is, as it name implies, a standard for digital signatures. Most digital signature algorithms work by reversing a public key cryptosystem: a message is signed with the sender’s private

The Digital Signature Algorithm in Maxima and Sage

The Digital Signature Algorithm, also known as the Digital Signature Standard is, as it name implies, a standard for digital signatures. Most digital signature algorithms work by reversing a public key cryptosystem: a message is signed with the sender’s private

Fun with numerical integration

Numerical integration, or quadrature (to use the old-fashioned, but charming, term) is the business of finding approximate values to definite integrals; integrals which are either impossible to be computed analytically, or for which the antiderivative is too complex to be

Fun with numerical integration

Numerical integration, or quadrature (to use the old-fashioned, but charming, term) is the business of finding approximate values to definite integrals; integrals which are either impossible to be computed analytically, or for which the antiderivative is too complex to be

Calculating pi

Here’s a lovely iteration which converges quadratically to . Start with: . Then: for for for This remarkable iteration comes from Borwein and Borwein’s “Pi and the AGM“; this is the first formula for of the many in the book.

Calculating pi

Here’s a lovely iteration which converges quadratically to . Start with: . Then: for for for This remarkable iteration comes from Borwein and Borwein’s “Pi and the AGM“; this is the first formula for of the many in the book.

Newton’s method in Maxima

I’m often surprised by maths teachers complaining, in blogs or online postings, of the lack of a good freeware general purpose computer algebra system. In fact there are several. The topic of this posting is Maxima. Maxima can do most

Newton’s method in Maxima

I’m often surprised by maths teachers complaining, in blogs or online postings, of the lack of a good freeware general purpose computer algebra system. In fact there are several. The topic of this posting is Maxima. Maxima can do most