In this paper, we develop a new method to produce explicit formulas for the number fG(n) of rooted spanning forests in circulant graphs G = Cn(s1,s2,…,sk) and C2n(s1,s2,…,sk,n). These are expressed through Chebyshev polynomials. We prove that both cases can be represented form p a(n)2, where a(n) is an integer sequence certain natural depending on parity n. Finally, find asymptotic formula Mahl...

Using the ground potential energy surface[M. Ayouz et al. J. Chem Phys 132 194309 (2010)] of the H−3 molecule, we have determined the energies and widths of the complex resonant levels of H−3 located up to 4000 cm −1 above the dissociation limit H−+H2(vd = 0, jd = 0). Bound and resonant levels of the H2D − and D2H − isotopologues have been also characterized within the same energy range. The me...

The purpose of this study was to identify those foot techniques in taekwondo to the head with the highest potential for success in competition. We compared five of the most frequently used kicks, the round kick, front leg axe kick, clench axe kick, jump spin back kick and jump spin hook kick. Since the right timing and fast movements vastly determine success, we looked at the reaction time, exe...

Population genetic parameters, direct and maternal breeding value, the trend in weaning weight of Limousin beef cattle calves were estimated period 1992-2019. Data 19 764 (15 437 purebred 4 327 crossbred) computed. Crossbred sired by bulls from Simmental dams. Calves question came 37 herds 240 sires Hungary. DFREML MTDFREML software was used for estimation population BLUP animal model value est...