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• Goldbach conjecture

The Goldbach conjecture says that every even number is the sum of two primes. A prime number is one that's only divisible by itself and 1.

http://qindex.info/i.php?f=6567#3745

The Goldbach conjecture says that every even number is the sum of two primes. A prime number is one that's only divisible by itself and 1.

http://qindex.info/i.php?f=6567#3745

• golden section

A length is devided into two parts in such a way that the smaller part is to the larger part in the same proportion as the larger one is to the whole.

http://qindex.info/i.php?f=6567#6292

A length is devided into two parts in such a way that the smaller part is to the larger part in the same proportion as the larger one is to the whole.

http://qindex.info/i.php?f=6567#6292

• Greek Alphabet

Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ ϱ Σ σ/ς Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω

http://qindex.info/i.php?f=6567#5203

Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ ϱ Σ σ/ς Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω

http://qindex.info/i.php?f=6567#5203