Author Archives: jrh794

About jrh794

I am a sixty-five year old math instructor at Southern Oregon University. I taught at the College of the Siskiyous in Weed California for twenty-six years. Prior to that I worked as a computer programmer, carpenter and in various other jobs. I graduated from Rice University in 1967 and have a MS in Operations Research from Stanford. In the past I have hand-built a stone house and taken long solo bicycle tours. Now I ride my mountain bike and play golf for recreation.

Creativity Conference II – What Inspired Me

I was inspired  by the smart, sensitive and, yes, creative presenters at our second Creativity Conference here at Southern Oregon University.  Last year I listed what I had learned.  This year I will list what stirred me to action. Art, … Continue reading

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Precalculus Essay Test

As something to do while waiting for new advisees at our first summer registration event, I attempted to turn a typical precalculus exam into an essay test – no calculations, just words.  Actually also diagrams.  You can see it at … Continue reading

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Changing the Limits of Integration

It is possible to change the limits of a definite integral to any limits you want by using a linear u-substitution.  To go from the integral from a to b to the integral from a’ to b’, use a u-substitution of u = mx + … Continue reading

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I Love Math – And It Makes Me Glad

I love the game of Go, I love golf, I love my wife, I love teaching, and I love math – and this makes me glad. Eight years ago, I ended that sentence with the word, “sad.”  Eight years of … Continue reading

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Machine Learning – So, Explain Yourself

We humans are not giving up without a fight. Though computers are clearly outthinking us, see AlphaGo for example, we aren’t listening.  Cynthia Rudin, my latest hero, describes the issue in this video. Humans need reasons. In the paper, A … Continue reading

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Science Problems with an Apology

I added these two problems to the Precalculus homework list as part of my effort to incorporate science examples in my classes. They were taken from solutions to some physics exercises and intended to give more practice on multi-variable systems. … Continue reading

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An Optimization Excursion

A student, Emily Wimmer, walked into my office.  She was trying to make sense of an optimization algorithm.  We worked it out and off she went to write a MATLAB program to test the algorithm on a well-behaved function. Of … Continue reading

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