A philosophical essay

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Many topics

A mathematical essay turns out to have much more than mathematics in it.

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Christmas cards (II)

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Chronicles

Including the unimportant is important.

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Christmas cards

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Staying in touch

How many people do you actually see regularly?

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Charted waters

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More than depths

A nautical chart contains an enormous amount of information, if you can read it.

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Gaps in knowledge

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High and low

We note some gaps in our expertise.

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But first-

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The two-step problem

We identify a major block to productivity.

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A changing syllabus

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What to learn

“Quantum Mechanics” is not what it used to be.

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Turning off the pumps

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Cooling unplugged

There are alternatives to the ubiquitous air conditioner.

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Attention to detail

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Small mistakes

We compare old and new examples of unforgiving calculations.

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Learning the kingdoms

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Classifying life

How do you go about organizing organisms?

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