# Quincunx

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reputation
526
bio website en.wikipedia.org/wiki/… location StackExchange Network age 16 member for 1 year, 8 months seen 11 hours ago profile views 118

My best programming language is Java, but when I'm too lazy to type out code, I go with python. My favorite language, Befunge 98, still has some features that elude me, for example, file io, but I have it's previous form, Befunge 93, down.

Mathematical symbols, for my personal use, but feel free to copy:

Logic:⇔⇒⊕∧∨¬∴ ∀∃

Sets: ∈∉∩∪∅⊆⊂× ℕℤℚℝℂ

Functions: →↦∘ ∂∫

Numbers: ≡≠≤≥∝±∓√ ⌊⌋ ⌈⌉ ∑∏

Lines: ∤∥∦

Other: …ℵ∋∞

# 23 Questions

 48 What would base $1$ be? 14 Convergent or Divergent? $\sum_{n=1}^\infty\left(2^{\frac1{n}}-1\right)$ 6 What is mathematically significant about this algorithm? 5 Infinite Geometric Series Formula Derivation 4 How is $Gal(\mathbb Q(\sqrt{2+\sqrt{2}})/\mathbb Q)\cong \mathbb Z/4\mathbb Z$?

# 872 Reputation

 +20 Using set notation, define the set of even natural numbers between 100 and 500. +5 How is $Gal(\mathbb Q(\sqrt{2+\sqrt{2}})/\mathbb Q)\cong \mathbb Z/4\mathbb Z$? +2 Understanding this pattern behind the Fibonacci sequence +5 Infinite Geometric Series Formula Derivation

 7 Convergent or Divergent? $\sum_{n=1}^\infty\left(2^{\frac1{n}}-1\right)$ 5 Why do you need to use the chain rule in differentiation of ln? 2 Using set notation, define the set of even natural numbers between 100 and 500. 2 How is $Gal(\mathbb Q(\sqrt{2+\sqrt{2}})/\mathbb Q)\cong \mathbb Z/4\mathbb Z$? 1 Can someone show working out for this fractional exponent problem (not homework)

# 40 Tags

 7 sequences-and-series × 5 2 galois-theory × 2 7 convergence × 2 2 group-isomorphism × 2 5 calculus × 8 2 discrete-mathematics 5 derivatives 2 elementary-set-theory 2 abstract-algebra × 3 1 algebra-precalculus × 2

# 17 Accounts

 Programming Puzzles & Code Golf 12,080 rep 63185 Stack Overflow 1,988 rep 21132 Mathematics 872 rep 526 Puzzling 491 rep 111 Meta Stack Exchange 450 rep 116