Useful symbols

Useful maths and logic symbols: ℂ ℝ ℚ ∞ φ | ψ ∑ ∫ ∮ ∇ ∂ Δ δ σ † ⊥ ∀ ⊧ → ⊢ ¬ ⊗ × π ∧ ⇔ ∃ ℵ ℝ ~ ∈ ℤ ± ∓ ÷ ∝ ≺ ≤ ≥ ≪ ≫ √ ≠ ∴ ⋉ ⋊ ≀ ≅ ◅ ▻ ⇒ ℍ ℙ ℤ ∪ ∘ ↦ ⊆ ⊂ ∉ ∅ ≡ ≅ △ ℕ ∃ ∨ ⇔ ↔ Π ⋈ ≈ ℶ∤ |

I think these ⋉ ⋊ are something to do with disused picnic sites and △ is an empty Youth Hostel.

Update: I understand that ∝ is a pair of forceps, Π is a half-finished Greek temple and ⋈ is a broken egg-timer. φ is just rude.

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About Dr_JAH

Independent Researcher
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