Mathematics book quiz of the month

Bought this book recently and just opened it at two random pages. Wow! A mathematical explanation for how the wind creates waves? And a discussion of waves with negative energy? This is super interesting. I know what I will spend the next weeks with!

So, which mathematical textbook is this?

Hint: The editor of the book series quotes Heaviside in his preface: "The series is divergent; therefore we may be able to do something with it."

Sometimes it's wonderful to do something useful away from the blackboard - analytical skills can be applied very broadly!

After months of acting up, the dishwasher (an old IKEA one) finally stopped working. Luckily my brother-in-law was in town and likes to tinker. We opened it up, cleaned a sensor (indicated in red), replaced a seal, and it works again! All without any training, just some respect for electricity. Three hours of fun avoided 35 kg waste and saved 1000 Euro.

Mathstodon

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