# Coefficients Sentence Examples

- In pure algebra Descartes expounded and illustrated the general methods of solving equations up to those of the fourth degree (and believed that his method could go beyond), stated the law which connects the positive and negative roots of an equation with the changes of sign in the consecutive terms, and introduced the method of indeterminate
**coefficients**for the solution of equations.' - In general his object is to reduce the final equation to a simple one by making such an assumption for the side of the square or cube to which the expression in x is to be equal as will make the necessary number of
**coefficients**vanish. - It is found that the influence of different acids on this action is proportional to their specific
**coefficients**of affinity. - Hence, if we assume that, in the Daniell's cell, the temperature
**coefficients**are negligible at the individual contacts as well as in the cell as a whole, the sign of the potential-difference ought to be the same at the surface of the zinc as it is at the surface of the copper. - Other " Galois " groups were defined whose substitution
**coefficients**have fixed numerical values, and are particularly associated with the theory of equations. - 1 (1 +/-lD1+Fl2D2+ï¿½3D3+...) (X i X 2 X 3 ...) ï¿½ Comparing
**coefficients**of like powers of A we obtain DX1(X1X2X3...) = (X2X3...), while D 8 (X 1 X 3 X 3 ...) =o unless the partition (X3X3X3...) contains a part s. - Between the
**coefficients**, so that only three of them are independent. - Further we find x=aX+a'Y+a"Z, y=bX z= cX+c'Y+ c"Z, and the problem is to express the nine
**coefficients**in terms of three independent quantities. - In general in space of n dimensions we have n substitutions similar to X l = a11x1 +a12x2 + ï¿½ ï¿½ ï¿½ + ainxn, and we have to express the n 2
**coefficients**in terms of Zn(n - I)i independent quantities; which must be possible, because X1+X2+..."IL Xn =xi+x2 +x3 +...+4. - From the differential
**coefficients**of the y's with regard to the x's we form the functional. - R is a function of the
**coefficients**which is called the " resultant " or " eliminant " of the k equations, and the process by which it is obtained is termed " elimination." - If al, a2, ...a, n be the roots of f=o, (1, R2, -Ai the roots of 0=o, the condition that some root of 0 =o may qq cause f to vanish is clearly R s, 5 =f (01)f (N2) ï¿½ ï¿½;f (Nn) = 0; so that Rf,q5 is the resultant of f and and expressed as a function of the roots, it is of degree m in each root 13, and of degree n in each root a, and also a symmetric function alike of the roots a and of the roots 1 3; hence, expressed in terms of the
**coefficients**, it is homogeneous and of degree n in the**coefficients**of f, and homogeneous and of degree m in the**coefficients**of 4.. - The resultant being a product of mn root differences, is of degree mn in the roots, and hence is of weight mn in the
**coefficients**of the forms; i.e. - Assuming then 01 to have the
**coefficients**B1, B2,...B,, and f l the**coefficients**A 1, A21...A,n, we may equate**coefficients**of like powers of x in the identity, and obtain m+n homogeneous linear equations satisfied by the m+n quantities B1, 2, ...B n, A 1, A 2, ...A m. - He first divides by the factor x -x', reducing it to the degree m - I in both x and x' where m>n; he then forms m equations by equating to zero the
**coefficients**of the various powers of x'; these equations involve the m powers xo, x, - of x, and regarding these as the unknowns of a system of linear equations the resultant is reached in the form of a determinant of order m. - CY The proof being of general application we may state that a system of values which causes the vanishing of k polynomials in k variables causes also the vanishing of the Jacobian, and in particular, when the forms are of the same degree, the vanishing also of the differential
**coefficients**of the Jacobian in regard to each of the variables. - Hence, finally, the resultant is expressed in terms of the
**coefficients**of the three equations, and since it is at once seen to be of degree mn in the coefficient of the third equation, by symmetry it must be of degrees np and pm in the**coefficients**of the first and second equations respectively. - It is the resultant of k polynomials each of degree m-I, and thus contains the
**coefficients**of each form to the degree (m-I)'-1; hence the total degrees in the**coefficients**of the k forms is, by addition, k (m - 1) k - 1; it may further be shown that the weight of each term of the resultant is constant and equal to m(m-I) - (Salmon, l.c. p. loo). - Xic-1, the
**coefficients**being any polynomials, it is clear that the k differentials have, in common, the system of roots derived from X1= X 2 = ... - Multiplying out the right-hand side and comparing
**coefficients**X1 = (1)x1, X 2 = (2) x2+(12)x1, X3 = (3)x3+(21)x2x1+ (13)x1, X4 = (4) x 4+(31) x 3 x 1+(22) x 2+(212) x2x 1 +(14)x1, Pt P2 P3 P1 P2 P3 Xm=?i(m l m 2 m 3 ...)xmlxm2xm3..., the summation being for all partitions of m. - Now log (1+ï¿½X1 +/22X2+/ï¿½3X3 +ï¿½ï¿½ï¿½) =E log (1+/2aix1+22aix2-1-/23ax3+...) whence, expanding by the exponential and multinomial theorems, a comparison of the
**coefficients**of ï¿½n gives (n) (-)v1+v2+v3+.. - (J1)11(J2)12(J3)j3ï¿½.ï¿½ jj!j2!j3!..ï¿½ where since(m1 1 m2 2 m3 3 ...) is the specification of (J1)j1(J2)j2(J3)j3..., ï¿½ l +ï¿½2+/23+ï¿½ï¿½ï¿½ =ii +j2+j3+ï¿½ï¿½ï¿½ï¿½ Comparison of the
**coefficients**of x:14243... - (0B) = (e), &c. The binomial
**coefficients**appear, in fact, as symmetric functions, and this is frequently of importance. - X (1 +PD1+12D2+...+ï¿½8D8+...) fm, and now expanding and equating
**coefficients**of like powers of /t D 1 f - Z(Difi)f2f3. - Other forms are n-1 n-2 2 ax +nbx x +n(n-i)cx x +..., 1121 2 the binomial
**coefficients**C) being replaced by s!(e), and n 1, n-1 1 n-2 2 ax 1 +l i ox l 'x 2 + L ?cx 1 'x2+..., the special convenience of which will appear later. - For present purposes the form will be written a0x 1 +(7)a1x1=1 x2+ C 2)o'2x12 x 2 +...+anx2, the notation adopted by German writers; the literal
**coefficients**have a rule placed over them to distinguish them from umbral**coefficients**which are introduced almost at once. - The
**coefficients**a 01 a1, a2,..ï¿½an, n+I in number are arbitrary. - If the form, sometimes termed a quantic, be equated to zero the n+I
**coefficients**are equivalent to but n, since one can be made unity by division and the equation is to be regarded as one for the determination of the ratio of the variables. - If the variables of the quantic f(x i, x 2) be subjected to the linear transformation x1 = a12Et2, x2 = a21E1+a2252, E1, being new variables replacing x1, x 2 and the
**coefficients**an, all, a 21, a22, termed the**coefficients**of substitution (or of transformation), being constants, we arrive at a transformed quantic f% 1tn n n-1 n-2 52) = a S +(1)a11 E 2 + (2)a2E1 E 2 +ï¿½ï¿½ï¿½ in the new variables which is of the same order as the original quantic; the new**coefficients**a, a, a'...a are linear functions 0 1 2 n of the original**coefficients**, and also linear functions of products, of the**coefficients**of substitution, of the nth degree. - In the theory of forms we seek functions of the
**coefficients**and variables of the original quantic which, save as to a power of the modulus of transformation, are equal to the like functions of the**coefficients**and variables of the transformed quantic. We may have such a function which does not involve the variables, viz. - Invariantive forms will be found to be homogeneous functions alike of the
**coefficients**and of the variables. - Which have different
**coefficients**, the same variables, and are of the same or different degrees in the variables; we may transform them all by the same substitution, so that they become _, _, _, _, _, _, f(a °, a, a 2, ...; (b 0, b, b 2, ...; 1, S2),.... - In addition, and transform each pair to a new pair by substitutions, having the same
**coefficients**a ll, a12, a 21, a 22 and arrive at functions of the original**coefficients**and variables (of one or more quantics) which possess the abovedefinied invariant property. - Symbolic Form.-Restricting consideration, for the present, to binary forms in a single pair of variables, we must introduce the symbolic form of Aronhold, Clebsch and Gordan; they write the form Iln n n-1 n-1 n n n aixi+a2x2) = 44+(1) a l a 2 x 1 x2+...+a2.x2=az wherein al, a2 are umbrae, such that n-1 n-1 n a 1, a 1 a 2, ...a 1 a 2, a2 are symbolical respreentations of the real
**coefficients**ï¿½o, ai,... - If we restrict ourselves to this set of symbols we can uniquely pass from a product of real
**coefficients**to the symbolic representations of such product, but we cannot, uniquely, from the symbols recover the real form, This is clear because we can write n-1 n-2 2 2n-3 3 a1a2 =a l a 2, a 1 a 2 = a 1 a2 while the same product of umbrae arises from n n-3 3 2n-3 3 aoa 3 = a l .a a 2 = a a 2 . - = a k; and if we wish to denote, by umbrae, a product of
**coefficients**of degree s we employ s sets of umbrae. - We write;L 22 = a 1 a 2 .b 1 n-2 b2s 3 n - 3 3 n-3 3 n-3 3 a 3 = a 1 a 2 .b 1 b 2 .c 1 c2, and so on whenever we require to represent a product of real
**coefficients**symbolically; we then have a one-to-one correspondence between the products of real**coefficients**and their symbolic forms. If we have a function of degree s in the**coefficients**, we may select any s sets of umbrae for use, and having made a selection we may when only one quantic is under consideration at any time permute the sets of umbrae in any manner without altering the real significance of the symbolism. - For a single quantic of the first order (ab) is the symbol of a function of the
**coefficients**which vanishes identically; thus (ab) =a1b2-a2bl= aw l -a1ao=0 and, indeed, from a remark made above we see that (ab) remains unchanged by interchange of a and b; but (ab), = -(ba), and these two facts necessitate (ab) = o. - To find the effect of linear transformation on the symbolic form of quantic we will disuse the
**coefficients**a 111 a 12, a21, a22, and employ A1, Iï¿½1, A2, ï¿½2. - If u, a quantic in x, y, z, ..., be expressed in terms of new variables X, Y, Z ...; and if, n,, ..., be quantities contragredient to x, y, z, ...; there are found to exist functions of, n, ?, ..., and of the
**coefficients**in u, which need, at most, be multiplied by powers of the modulus to be made equal to the same functions of E, H, Z, ... - Of the transformed
**coefficients**of u; such functions are called contravariants of u. - There also exist functions, which involve both sets of variables as well as the
**coefficients**of u, possessing a like property; such have been termed mixed concomitants, and they, like contravariants, may appertain as well to a system of forms as to a single form. - When either of the forms is of an order higher than the first (ab), as not being expressible in terms of the actual
**coefficients**of the forms, is not an invariant and has no significance. - The degree of the covariant in the
**coefficients**is equal to the number of different symbols a, b, c, ... - It is (f = (ab) 2 a n-2 r7 2 =Hx - =H; unsymbolically bolically it is a numerical multiple of the determinant a2 f a2f (32 f) 2ï¿½ It is also the first transvectant of the differxi ax axa x 2 ential
**coefficients**of the form with regard to the variables, viz. - If the invariants and covariants of this composite quantic be formed we obtain functions of X such that the
**coefficients**of the various powers of X are simultaneous invariants of f and 4). - X1, X 2, u1, /22 being as usual the
**coefficients**of substitution, let x1a ? - A binary form of order n contains n independent constants, three of which by linear transformation can be given determinate values; the remaining n-3
**coefficients**, together with the determinant of transformation, give us n -2 parameters, and in consequence one relation must exist between any n - I invariants of the form, and fixing upon n-2 invariants every other invariant is a rational function of its members. - The Binary Quadratic.-The complete system consists of the form itself, ax, and the discriminant, which is the second transvectant of the form upon itself, viz.: (f, f') 2 = (ab) 2; or, in real
**coefficients**, 2(a 0 a 2 a 2 1). - This can be verified by equating to zero the five
**coefficients**of the Hessian (ab) 2 axb2. - - (aa) and then expresses the
**coefficients**, on the right, in terms of the fundamental invariants. - To obtain the real form we multiply out, and, in the result, substitute for the products of symbols the real
**coefficients**which they denote. - If ai, bx, cx be different forms we obtain, after development of the squared determinant and conversion to the real form (employing single and double dashes to distinguish the real
**coefficients**of bx and cz), a(b'c"+b"c'-2 f'f") +b(c'a"+c"a'-2g'g") +c(a' +a"b'-2h'h")+2f(g'h"+g"h'-a' + 2g (h ' f"+h"f'-b'g"-b"g')+2h(f'g"+f"g'-c'h"-c"h'); a simultaneous invariant of the three forms, and now suppressing the dashes we obtain 6 (abc+2fgh -af t - bg 2 -ch2), the expression in brackets being the S well-known invariant of az, the vanishing of which expresses the condition that the form may break up into two linear factors, or, geometrically, that the conic may represent two right lines. - Hesse's canonical form shows at once that there cannot be more than two independent invariants; for if there were three we could, by elimination of the modulus of transformation, obtain two functions of the
**coefficients**equal to functions of m, and thus, by elimination of m, obtain a relation between the**coefficients**, showing them not to be independent, which is contrary to the hypothesis. - This is of degree 8 in the
**coefficients**, and degree 6 in the variables, and, for the canonical form, has the expression -9m 6 (x 3 +y 3 +z 3) 2 - (2m +5m 4 +20m 7) (x3 +y3+z3)xyz - (15m 2 +78m 5 -12m 8) Passing on to the ternary quartic we find that the number of ground forms is apparently very great. - Iv.) was the first to remark that the study of covariants may be reduced to the study of their leading
**coefficients**, and that from any relations connecting the latter are immediately derivable the relations connecting the former. - Two of these show that the leading coefficient of any covariant is an isobaric and homogeneous function of the
**coefficients**of the form; the remaining two may be regarded as operators which cause the vanishing of the covariant.