HTML Quick Reference - HTML5 and CSS Comprehensive - page 667

Table F-2 Mathematical and Technical Character References

Symbol Character Reference Description

` ∧ Logical and

/ ∠ Angle

≈ ≈ Almost equal to

d ∩ Intersection

c ∪ Union

° ° Degree sign

÷ ÷ Division sign

≡ Identical to

;

" ∃ There exists

ƒ ƒ Function

5

∀ For all

½ ½ Fraction one half

¼ ¼ Fraction one quarter

¾ ¾ Fraction three quarters

≥ ≥ Greater-than or equal to

∞ &inin; Infinity

∫ ∫ Integral

H

∈ Element of

≤ ≤ Less-than or equal to

µ µ Micro sign

= ∇ Backward difference

≠ ≠ Not equal to

I ∋ Contains as a member

∂ ∂ Partial differential

' ⊥ Perpendicular

; ± Plus-minus sign

∏ n-ary product

P

r

∝ Proportional to

√ √ Square root

~ ∼ Tilde

∑ ∑ n-ary summation

[ ∴ Therefore

Table F-3 Arrow Character References

Symbol Character Reference Description

T ↓ Downward arrow

4 ↔ Left right arrow

d ← Leftward arrow

S → Rightward arrow

c ↑ Upward arrow