The condition in this theorem is clearly the appropriate functorial definition for quotient group schemes the naive idea of requiring all F(R) -> G(R) suijective would rule out many cases of interest. The functorial statement can be understood as a sheaf epimorphism condition, as the next section will briefly explain. [Pg.125]

The family of all symmorphy equivalence classes of a given object p(r) form the symmorphy group hp of the object p(r). This group hp is formally defined [43,108] as the quotient group of group gp with respect to the symmorphy equivalence nip. The product of two symmorphy classes Tj and T2 in the symmorphy group hp is defined as the class T3,... [Pg.200]

The dimensionless groups can be replaced by the corresponding differential quotient expressions for the derivatives as ... [Pg.189]

If the HI is greater diaii unity as a consequence of summing several haz,ard quotients of similar value, it would be appropriate to segregate the compounds by effect and mechanism of action and to derive separate luizard indices for each group. [Pg.400]

For the exponential heating schedule (z = 1), the quantities Ed and T occur only when grouped in the term e = Ed/RT, and thus particularly simple expressions for the temperature Tm at the maximum desorption rate result, as was pointed out by Carter et al. (79) for the first-order kinetics and for the given quotient (kd/ax), Tm is exactly proportional to Ed for the second-order kinetics, the same applies as long as the initial coverage (Who/M8t) remains constant. For heating schedules other than the exponential one, the shift of Tm with increasing Ed is not exactly linear, due to the term T 1. [Pg.367]

Let G be a finite group acting on a compact differentiable manifold X. Then there exists the well known formula for the Euler number of the quotient... [Pg.54]

Here C(g) is the centralizer of g and [conjugacy classes of G. Hirzebruch and Hofer consider in particular the action of the symmetric group G(n) on the nth power Sn of a smooth projective surface 5 by permuting the factors. The quotient is the symmetric power S(" and ivn Slnl — is a canonical resolution of The canonical divisor Ks is invariant under the G(n) action. [Pg.54]

Keel [Keel (1)] has proved by a different method that the symmetric group G(3) acts on H3(X) and that the quotient is the blowup of X l along 1,2)W-... [Pg.71]

Gouy-Chapman, Stern, and triple layer). Methods which have been used for determining thermodynamic constants from experimental data for surface hydrolysis reactions are examined critically. One method of linear extrapolation of the logarithm of the activity quotient to zero surface charge is shown to bias the values which are obtained for the intrinsic acidity constants of the diprotic surface groups. The advantages of a simple model based on monoprotic surface groups and a Stern model of the electric double layer are discussed. The model is physically plausible, and mathematically consistent with adsorption and surface potential data. [Pg.54]

The total energy of this adsorption reaction can be found experimentally from the microscopic activity quotient, and separated theoretically into the following components (1) transfer of the ion to be adsorbed from the bulk of solution to the oxide surface plane, at which the mean electrostatic potential is t/>q with respect to the bulk of solution (2) reaction of the adsorbate in the surface plane with a functional group at the surface (3) transfer of a fraction of the counter charge from solution into the solution part of the double layer by attraction of counter ions and (4) transfer of the remainder of the counter charge by expulsion of co-ions from the solution part of the double layer to the solution. [Pg.57]

This construction works even in the case X = C. Although is non-compact, we also have an appropriate analytical package, i.e. the weighted Sobolev space (see e.g., [61] for detail). In this case, we must consider the framed moduli space, which means that we take a quotient by a group of gauge transformations converging to the identity at the end of X. In other words, if we consider the one point compactification U oo, then... [Pg.38]

The hermitian metric and the quaternion module structure on M descends to Mp. In particular, M " is a hyper-Kahler manifold. There is a natural action on M " of a Lie group Ur(F) = rifcU(Ffc). This action preserves the hyper-Kahler structure. The corresponding hyper-Kahler moment map is p o o where i is the inclusion M " C M, /r is the hyper-Kahler moment map for U(F)-action on M, and p is the orthogonal projection to 0 u Vk) in u(F). We denote this hyper-Kahler moment map also by p = (/ri, /T2, / s)- This increases the flexibility of the choice of parameters. Take = (Co> Cn > Cn) ( = 1) 2, 3) such that (I is a scalar matrix in u(14)- Then we can consider a hyper-Kahler quotient... [Pg.47]

On the other hand, since S X has only quotient singularities by finite groups, we have... [Pg.68]

II revient au mdme de dire que localement sur S pour la topologie fppf le schema X est isomorphe (comme schema A groupe d operateur G) au quotient fppf de G par un sous-schema en groupes H (resp. est isomorphe A G). [Pg.95]

See also in sourсe #XX -- [ Pg.64 ]

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