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Patrick Stevens

Harpenden, UK

https://www.patrickstevens.co.uk

Former Maths student at Cambridge (my fourth-year courses were in logic/computability/set theory and also combinatorics); now a software engineer.

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Top Questions
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552
Why is $1 - \frac{1}{1 - \frac{1}{1 - \ldots}}$ not real?
math.stackexchange.com

126
What is lost when we move from reals to complex numbers?
math.stackexchange.com

111
Does the International Math Olympiad help research mathematics?
academia.stackexchange.com

68
Abusing mathematical notation, are these examples of abuse?
math.stackexchange.com

63
Mathematical ideas that took long to define rigorously
math.stackexchange.com

61
Why does Wolfram Alpha say that $\infty^\infty$ results in "complex infinity"?
math.stackexchange.com

50
Intuitive explanation for why $\left(1-\frac1n\right)^n \to \frac1e$
math.stackexchange.com

46
How far back in time would Maths be understandable to a modern mathematician?
worldbuilding.stackexchange.com

33
Do I hear a cat?
puzzling.stackexchange.com

32
What is the exact difficulty in defining a point in Euclidean geometry?
math.stackexchange.com

30
True or false: {{∅}} ⊂ {∅,{∅}}
math.stackexchange.com

26
Correct set notation for "all integers which are not multiples of 7"?
math.stackexchange.com

23
Are financial markets "unique" for each "currency pair", or are they simply "translated"?
economics.stackexchange.com

23
Mathematical notation $\max$ with simple example for non-mathematician
math.stackexchange.com

22
Mathematica cannot seem to properly handle times in the 1 hour before clocks go back
mathematica.stackexchange.com

22
Why is this seemingly valid argument using modus tollens not valid? How is this an example of "begging the question"?
math.stackexchange.com

21
GroupBy twice gives different results
mathematica.stackexchange.com

20
Why does a product $\lim_{n\to\infty} \prod_{i=1}^n (1- \frac{1}{n+2i})$ lead to infinity?
math.stackexchange.com

20
Logical proposition for "Every positive integer can be written as the sum of 2 squares"
math.stackexchange.com

19
Similar Matrices and their Jordan Canonical Forms
math.stackexchange.com

18
Can an open set contain its supremum?
math.stackexchange.com

18
What is an example of a proof by minimal counterexample?
math.stackexchange.com

18
Which branch of mathematics rigorously defines infinitesimals?
math.stackexchange.com

18
Why does "guess and verify technique" not involve circular reasoning?
math.stackexchange.com

18
How does modular arithmetic work - Fermat's last theorem near misses?
math.stackexchange.com

17
What is exactly the difference between a definition and an axiom?
math.stackexchange.com

17
What is a Universal Construction in Category Theory?
math.stackexchange.com

16
Strategy for reading math books, is it better to prove the theorems yourself or just read them?
math.stackexchange.com

16
To say something in choir word
english.stackexchange.com

16
Do Gödel numbers have a practical use?
math.stackexchange.com

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