Tag Archives: matrix multiplication

Groupings, Shopping Lists, and Vectors: The Series

Posted on 2010/09/11 by

This is a series on vector algebra, but it hasn’t wrapped up yet.  Here are the installments as of now: Quantity – Different Kinds of Numbers: Vectors – it really all started with this post.  But I didn’t know it … Continue reading →

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Groupings, Shopping Lists, Vectors: part 24

Posted on 2010/03/12 by

In this series of posts on the topic of vectors, I’ve been primarily interested in playing with situations in which the notion of a vector naturally arises.  Looking at shopping lists was one of those.   A shopping list is … Continue reading →

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Groupings, Shopping Lists, Vectors: part 23

Posted on 2010/03/02 by

In this post I’m going to look at something usually referred to as linear combinations.  In the prior post, we had an occasion to look at coordinate systems where the axes are not at right angles.  We saw that you … Continue reading →

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Groupings, Shopping Lists, Vectors: part 22

Posted on 2010/02/22 by

In the last few posts in this series I’ve examined some consequences of British values, where we have pounds and shillings (and also pence) – but then have this other value, the guinea, which equals one pound and one shilling.  … Continue reading →

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Groupings, Shopping Lists, Vectors: part 21

Posted on 2010/02/17 by

In the previous post in this series, part 20, I showed a matrix multiplication to convert a value stated in guineas and shillings into one stated in pounds and shillings.  We were interested in the same value, expressed in different … Continue reading →

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Groupings, Shopping Lists, Vectors: part 20

Posted on 2010/02/12 by

In England, the main currency is called the pound.  Smaller units are called shillings and pence.  A pound is 20 shillings, a shilling is 5 pence, hence a pound is 100 pence.  This system has been in place since 1971; … Continue reading →

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Groupings, Shopping Lists, Vectors: part 19

Posted on 2010/01/30 by

In this post, I will try to connect a set of equations with matrices and vectors in a way that isn’t simply a notational shift.  In part 18 of this series, I brought up the vast preponderance of square matrices … Continue reading →

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