Boris S. Jacobi

Green ’ s matrix from Jacobi - matrix Hamiltonian ∗

We propose two ways for determining the Green’s matrix for problems admitting Hamiltonians that have infinite symmetric tridiagonal (i.e. Jacobi) matrix form on some basis representation. In addition to the recurrence relation comming from the Jacobi-matrix, the first approach also requires the matrix elements of the Green’s operator between the first elements of the basis. In the second approa...

Boris Dubin

Boris Ephrussi (1901-1979)

Boris Ephrussi studied fruit flies, yeast, and mouse [3] genetics and development while working in France and the US during the twentieth century. In yeast, Ephrussi studied how mutations in the cytoplasm persisted across generations. In mice he studied the genetics of hybrids and the development of cancer. Working with George Wells Beadle [4] on the causes of different eye colors in fruit flie...

CHAPTER FOUR PROTACTINIUM Boris

Protactinium, element 91, is one of the most rare of the naturally occurring elements and may well be the most difficult of all to extract from natural sources. Protactinium is, formally, the third element of the actinide series and the first having a 5f electron. The superconducting properties of protactinium metal provide clear evidence that Pa is a true actinide element (Smith et al., 1979)....

On some generalizations of Jacobi ’ s Residue Formula

Using Bochner-Martinelli type residual currents we prove some generalizations of Jacobi’s Residue Formula, which allow proper polynomial maps to have ’common zeroes at infinity ’, in projective or toric situations.