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P. HISTORY OF ' AATHEMATICAL - School of Mathematics

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188 A <strong>HISTORY</strong> <strong>OF</strong> MATHEMATICAL NOTATIONS<br />

546. Plus, minU8.-<br />

Sign Meaning I<br />

Year Reference<br />

+ .................<br />

- .................<br />

± .................<br />

±,± ±,=F )<br />

tt .........<br />

(±), (±)<br />

±, (±), «±» }<br />

±, T, (T) ....<br />

(+)................<br />

E1l. ................<br />

-lor I............<br />

+<br />

-<br />

Plus or minus<br />

The upper signs simultaneously,<br />

or the lower simultaneously<br />

Three independent ambiguities<br />

in sign<br />

Logical combination<br />

Logical combination<br />

"Minus one" (sign <strong>of</strong> quality)<br />

1666 .... P<br />

1666 .... P<br />

1673<br />

1684P<br />

1684P<br />

?<br />

?<br />

1684P<br />

1684P<br />

?<br />

?<br />

?<br />

?<br />

V,15<br />

V,15<br />

0, 100, 126; I, 117<br />

1,27<br />

V, 222; VII, 56<br />

VII, 145<br />

VII, 139, 153<br />

V,222<br />

V,222<br />

V, 169, 170<br />

V,198<br />

VII, 261, 285<br />

V,370<br />

547. MuUiplication.-<br />

Sign Meaning Year Reference<br />

...................<br />

,... .................<br />

X ...........• ·<br />

,...................<br />

...................<br />

...............................<br />

i ... ················<br />

* .................<br />

Apposition<br />

Multiplication<br />

Multiplication<br />

Multiplication<br />

Multiplication<br />

Multiplication<br />

Multiplication aDd separation<br />

as in 2 1 ; 1.2.3<br />

Multiplication<br />

1710 ..•. P<br />

1666P<br />

?<br />

1672 ....<br />

1675<br />

1677<br />

1676 ....<br />

1674 ...•<br />

1710P<br />

1676 ••.•<br />

1684, 1691P<br />

1713<br />

1705<br />

VII,219<br />

V, 15, 20, 24, 25<br />

VII,33,45,49,54,100,22O<br />

1,29.156<br />

E, 128. 138, 139<br />

B,242<br />

I. 117; B, 242<br />

Cat. crit., No. 775; I, 100;<br />

VI,228<br />

VII,219<br />

I, 128; II, 196, 239; III, 36,<br />

1110.341; IV, 211; V, Ill,<br />

112; VII, 54, 103, 175<br />

V, 129, 222; VII, 219<br />

111,986<br />

IV, 211<br />

548. Division.-<br />

Sign<br />

Meaning<br />

Year<br />

Reference<br />

II<br />

ij .................. Fraction, division 1666 ••.. P V, 48, 49, 220<br />

1673 •••. I, 46, 116; IV, 211; VII, 54,<br />

170<br />

v .....· ............ Division 1666P<br />

1675 .••.<br />

................... Division, ratio 1676 ...•<br />

1684 .••• P<br />

V, 15,20<br />

E, 134; IlI 526; VII, 91, 103<br />

1,90, 128; kV, 211, 400; VII,<br />

170<br />

V, 131, 223, 228

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