Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Character coincidence

Now we come to the question whether there exists a domain of conflict on which the various characters coincide, if we allowed for all characters, then coincidence would be possible only on a trivial domain (see the example below and part (d) of Proposition 3 in the... [Pg.215]

The crack is said to have a zero opening in this case. As it turned out there is no singularity of the solution provided the crack has a zero opening. What this means is the solution of (3.144), (3.147), (3.148) coincides with the solution of (3.140)-(3.142) found in the domain Q with the initial and boundary conditions (3.144), (3.145) (and without (3.143)). In the last case the equations (3.141), (3.142) hold in Q. This removable singularity property is of local character. Namely, if O(x ) is a neighbourhood of the point and... [Pg.215]

In principle, the calculation of bonding in two or three dimensions follows the same scheme as outlined for the chain extended in one dimension. Instead of one lattice constant a, two or three lattice constants a, b and c have to be considered, and instead of one sequential number k, two or three numbers kx, ky and k- are needed. The triplet of numbers k = (kx, ky, kz) is called wave vector. This term expresses the relation with the momentum of the electron. The momentum has vectorial character, its direction coincides with the direction of k the magnitudes of both are related by the de Broglie relation [equation (10.5)]. In the directions a, b and c the components of k run from 0 to nja, njb and n/c, respectively. As the direction of motion and the momentum of an electron can be reversed, we also allow for negative values of kx, ky and kz, with values that run from 0 to —nja etc. However, for the calculation of the energy states the positive values are sufficient, since according to equation (10.4) the energy of a wave function is E(k) = E(—k). [Pg.99]

Split-Meridional Distribution. Figure 9.4a displays a case of a unimodal, non-meridional orientation distribution the most probable orientation of the structural entities does not coincide with the meridian. If the orientation distribution itself is broad, the split character of the distribution may be invisible. Then it is an apparently meridional distribution. [Pg.211]

On the basis of calculations the reductions of depositions and air concentrations of all selected POPs in each particular European countries are evaluated. The relative and absolute reduction of PCDD/Fs deposition over Central and Eastern European countries in comparison with relative emission changes is given in Figures 5(a) and (b). For the considered period the maximum relative decrease in PCDD/Fs depositions was obtained for Bulgaria and Belarus (about 3 times) (Figure 5(a)). At that the character of relative decrease in PCDD/Fs total depositions did not completely coincide with that of emissions. It can partly be explained by the influence of trans-boundary transport of PCDD/Fs and by the impact of re-emission flux in these countries. The highest absolute reduction was observed in Russia, Ukraine and Poland (Figure 5(b)). [Pg.388]

Let us consider the character table of the C4 group and the representation F displayed below (see Table 7.3). F is, reducible, because its character does not coincide with any one of the irreducible representations of the Cav group. According to Equation (7.4) and the character table (Table 7.3), we can write... [Pg.245]

There is no simple explanation for the much more pronounced instability to pressure of CO compared to N2. Since the only structural difference arises from the heteroatomic character of CO, one could expect that the molecular dipole moment increases with pressure leading to a higher compressibility of CO. But no evidence for this is obtained from either the ab initio calculation or experimentally. In fact the equation of state of nitrogen and carbon monoxide are practically coincident in the pressure range of interest. One other point of interest is the head-to-tail disorder present in carbon monoxide because it has been observed in several high pressure experiments that defects and disorder can play an important role. [Pg.174]

The linear water molecule belongs to the D point group. The classifications of atomic and group orbitals must be carried out using the character table. The molecular axis, C, is arranged to coincide with the z axis. [Pg.97]

Of course, all characters mentioned in this section coincide on trivial bundles, that is bundles (/ / 2. . Rn) such that Rt R2. . . = RH. Harmonic bundles however are not trivial in general on the contrary, they are complex enough to generate arbitrary orderings, even if those harmonic bundles are restricted to a particular kind. To illustrate this and also some other interesting relationships concerning harmonic bundles, we shall discuss in some detail the case of three alternatives. [Pg.216]


See other pages where Character coincidence is mentioned: [Pg.219]    [Pg.220]    [Pg.220]    [Pg.232]    [Pg.219]    [Pg.220]    [Pg.220]    [Pg.232]    [Pg.175]    [Pg.428]    [Pg.17]    [Pg.198]    [Pg.111]    [Pg.70]    [Pg.199]    [Pg.79]    [Pg.10]    [Pg.35]    [Pg.174]    [Pg.245]    [Pg.179]    [Pg.45]    [Pg.286]    [Pg.105]    [Pg.377]    [Pg.378]    [Pg.155]    [Pg.14]    [Pg.426]    [Pg.162]    [Pg.81]    [Pg.230]    [Pg.93]    [Pg.248]    [Pg.147]    [Pg.73]    [Pg.9]    [Pg.29]    [Pg.26]    [Pg.187]    [Pg.174]    [Pg.233]    [Pg.86]    [Pg.216]    [Pg.216]    [Pg.218]   
See also in sourсe #XX -- [ Pg.204 ]




SEARCH



Coincidence

© 2024 chempedia.info