Hamburger of the country." Louis Lassen of Louis' Lunch, a small lunch wagon in New Haven, Connecticut, is said to have sold the first hamburger and steak sandwich in the U.S. in 1900. "New York" magazine states that "The dish actually had no name until some rowdy sailors from Hamburg named the meat on a bun after themselves years later", noting also that this claim is subject to dispute. A customer ordered a quick hot meal and Louis was out of steaks. Taking ground beef trimmings, Louis made a patty and grilled it, putting it between two slices of toast. Some
Hamburger moment problem "Jacobi matrix representation". This in turn leads to a "tridiagonal model" of positive Hankel kernels. An explicit calculation of the Cayley transform of "T" shows the connection with what is called the "Nevanlinna class" of analytic functions on the left half plane. Passing to the non-commutative setting, this motivates "Krein's formula" which parametrizes the extensions of partial isometries. The cumulative distribution function and the probability density function can often be found by applying the inverse Laplace transform to the moment generating function provided that this function converges. Hamburger moment problem In mathematics, the Hamburger moment problem, named after Hans Ludwig