ಗಣಿತದ ಸಂಕೇತಗಳನ್ನು ಬಳಕೆಗೆ ತಂದ ಮೊದಲಿಗರು

ಗಣಿತದ ಸಂಕೇತಗಳನ್ನು ಬಳಕೆಗೆ ತಂದ ಮೊದಲಿಗರು

Symbol	Meaning	Introduced by	Year
∞	infinity	J. Wallis	1655
e	base of the natural logarithms	L. Euler	1736
π	ratio of the length of a circumference to the diameter	W. Jones	1706
i	square toot of −1	L. Euler	1777 (pubbl. 1794)
i,j,k	unit vectors	W. Hamilton	1853
Π(α)	angle of parallelism	N.I. Lobachevskii	1835
x,y,z	Unknown or variable quantities	R. Descartes	1637
v⃗	vector	A.L. Cauchy	1853
+,−	addition, subtraction	German mathematicians	end of XV cent.
×	multiplication	W. Oughtred	1631
⋅	multiplication	G. Leibniz	1698
:	division	G. Leibniz	1684
a2,…,an	powers	R. Descartes	1637
√	square root	K. Rudolff	1525
√n	roots	A. Girard	1629
Log	logarithm	J. Kepler	1624
log	logarithm	B. Cavalieri	1632
sin	sine	L. Euler	1748
cos	cosine	L. Euler	1748
tg	tangent	L. Euler	1753
tan	tangent	L. Euler	1753
arcsin	arcsine	J. Lagrange	1772
Sh	hyperbolic sine	V. Riccati	1757
Ch	hyperbolic cosine	V. Riccati	1757
dx,ddx,d2x,d3x,…	differentials	G. Leibniz	1675 (publ. 1684)
∫ydx	integral	G. Leibniz	1675 (publ. 1684)
ddx	derivative	G. Leibniz	1675
f′,y′,f′x	derivative	J. Lagrange	1770-1779
Δx	difference, increment	L. Euler	1755
∂∂x	partial derivative	A. Legendre	1786
∫baf(x)dx	definite integral	J. Fourier	1819-1820
∑	sum	L. Euler	1755
∏	product	C.F. Gauss	1812
!	factorial	Ch. Kramp	1808
|x|	absolute value	K. Weierstrass	1841
lim	limit	S. l'Huillier	1786
limn=∞	limit	W. Hamilton	1853
limn→∞	limit	various mathematicians	beg. of 20th cent.
ζ	zeta-function	B. Riemann	1857
Γ	gamma-function	A. Legendre	1808
B	beta-function	J. Binet	1839
Δ	Laplace operator	R. Murphy	1833
∇	nabla, Hamilton operator	W. Hamilton	1853
ϕx	function	J. Bernoulli	1718
fx	function	L. Euler	1734
=	equality	R. Recorde	1557
>,<	greater than, smaller than	T. Harriot	1631
≡	congruence	C.F. Gauss	1801
||	parallel	W. Oughtred	1677 (post. publ.)
⊥	perpendicular	P. Hérigone	1634