[Jprogramming] table challenge in simple J

[Roger Hui]

Ken credited Linda with finding a good way to introduce matrices to
students.  From section 5 of http://www.jsoftware.com/papers/autobio.htm :

There were also surprises in the writing. Although the great utility of
matrices was recognized (as in a 3-by-2 to represent a triangle), there was
a great reluctance to use them because the concept was considered to be too
difficult.

Linda Alvord said to introduce the matrix as an outer product — an idea
that the rest of us thought outrageous, until Linda pointed out that the
kids already knew the idea from familiar addition and multiplication tables.


On Mon, Nov 21, 2011 at 10:03 AM, Roger Hui <rogerhui.canada at gmail.com>wrote:

> An amusing anecdote about Linda by Eugene McDonnell, from 31 years ago
> http://www.jsoftware.com/papers/eem/qq111.htm
>
>
>
>
> On Mon, Nov 21, 2011 at 4:29 AM, Linda Alvord <lindaalvord at verizon.net>wrote:
>
>> Thanks.  Almost 40 years, retired in 1995, now watercolor,  guess I
>> missed it, got excited about j701jhs. NB.  My first 'literary' train.
>>
>> Linda
>>
>> -----Original Message-----
>> From: programming-bounces at jsoftware.com [mailto:
>> programming-bounces at jsoftware.com] On Behalf Of Kip Murray
>> Sent: Sunday, November 20, 2011 2:47 PM
>> To: Programming forum
>> Subject: Re: [Jprogramming] table challenge in simple J
>>
>> Have you been a teacher?  Great exposition!
>>
>
>