Some Mathematical Symbols Supported by HTML Char Number Entity Description ∀ ∀ ∀ FOR ALL ∂ ∂ ∂ PARTIAL DIFFERENTIAL ∃ ∃ ∃ THERE EXISTS ∅ ∅ ∅ EMPTY SETS ∇ ∇ ∇ NABLA ∈ ∈ ∈ ELEMENT OF ∉ ∉ ∉ NOT AN ELEMENT OF ∋ ∋ ∋ CONTAINS AS MEMBER ∏ ∏ ∏ N-ARY PRODUCT ∑ ∑ ∑ N-ARY SUMMATION Some Greek Letters Supported by HTML Char Number Entity Description Α Α Α GREEK CAPITAL LETTER ALPHA Β Β Β GREEK CAPITAL LETTER BETA Γ Γ Γ GREEK CAPITAL LETTER GAMMA Δ Δ Δ GREEK CAPITAL LETTER DELTA Ε Ε Ε GREEK CAPITAL LETTER EPSILON Ζ Ζ Ζ GREEK CAPITAL LETTER ZETA Some Other Entities Supported by HTML Char Number Entity Description © © © COPYRIGHT SIGN ® ® ® REGISTERED SIGN € € € EURO SIGN ™ ™ ™ TRADEMARK ← ← ← LEFTWARDS ARROW ↑ ↑ ↑ UPWARDS ARROW → → → RIGHTWARDS ARROW ↓ ↓ ↓ DOWNWARDS ARROW ♠ ♠ ♠ BLACK SPADE SUIT ♣ ♣ ♣ BLACK CLUB SUIT ♥ ♥ ♥ BLACK HEART SUIT ♦ ♦ ♦ BLACK DIAMOND SUIT