Page:U.S. Government Printing Office Style Manual 2008.djvu/279

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ELECTRICAL— Con.

ρ resistivity; rho

Λ equivalent conductivity

HP horsepower

MATHEMATICAL

 ̅ vinculum (above letters)

∺ geometrical proportion

∹ difference, excess

∥ parallel

∥s parallels

∦ not parallels

| | absolute value

∙ multiplied by

∶ is to; ratio

÷ divided by

∴ therefore; hence

∵ because

∷ proportion; as

≪ is dominated by

> greater than

⫍ greater than

≥ greater than or equal to

≧ greater than or equal to

≷ greater than or less than

≯ is not greater than

< less than

⫎ less than

≶ less than or greater than

≮ is not less than

⪪ smaller than

≤ less than or equal to

≦ less than or equal to

≧ or ≥ greater than or equal to

⋜ equal to or less than

⪙ equal to or less than

⪚ is not greater than equal to or less than

⋝ equal to or greater than

⪚ is not less than equal to or greater than

⫨ equilateral

⊥ perpendicular to

⊢ assertion sign

≐ approaches

≐ approaches a limit

≚ equal angles

≠ not equal to

≡ identical with

≢ not identical with

score

≈ or ≒ nearly equal to

= equal to

~ difference

≃ perspective to

≅ congruent to approximately equal

≏ difference between

≎ geometrically equivalent to

( included in

) excluded from

⊂ is contained in

∪ logical sum or union

∩ logical product or intersection

√ radical

√ root

${\sqrt[{2}]{}}$ square root

${\sqrt[{3}]{}}$ cube root

${\sqrt[{4}]{}}$ fourth root

${\sqrt[{5}]{}}$ fifth root

${\sqrt[{6}]{}}$ sixth root

π pi

ϵ base (2.718) of natural system of logarithms; epsilon

∈ is a member of; dielectric constant; mean error; epsilon

+ plus

➕ bold plus

− minus

➖ bold minus

/ shill(ing); slash; virgule

± plus or minus

∓ minus or plus

× multiplied by

= bold equal

# number

⅌ per

% percent

∫ integral

| single bond

\ single bond

/ single bond

|| double bond

\\ double bond

// double bond

⌬ benzene ring

∂ or δ differential; variation

∂ Italian differential

→ approaches limit of

∿ cycle sine

∫ horizontal integral

∮ contour integral

∝ variation; varies as

∏ product

∑ summation of; sum; sigma

! or ∟ factorial product

MEASURE

℔ pound

ʒ dram

ƒʒ fluid dram

℥ ounce

ƒ℥ fluid ounce

O pint

MISCELLANEOUS

§ section

† dagger

‡ double dagger

℀ account of

℅ care of

score

¶ paragraph

þ Anglo-Saxon

℄ center line

☌ conjunction

⊥ perpendicular to

" or “ ditto

∝ variation

℞ recipe

⊏ move right

⊐ move left

○ or ⊙ or ① annual

⊙⊙ or ② biennial

∈ element of

℈ scruple

ƒ function

! exclamation mark

⊞ plus in square

♃ perennial