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Andrea Amati (ca. 1505 - 1577, Cremona) was a luthier, from Cremona, Italy. [1] [2] Amati is credited with making the first instruments of the violin family that are in the form we use today. [3] Several of his instruments survive to the present day, and some of them can still be played.
A claim that Andrea Amati received the first order for a violin from Lorenzo de' Medici in 1555 is invalid as Lorenzo de' Medici died in 1492. A number of Andrea Amati's instruments survived for some time, dating between 1538 (Amati made the first Cello called "The King" in 1538) and 1574.
The Sahlqvist correspondence theorem states that every Sahlqvist formula is canonical, and corresponds to a class of Kripke frames definable by a first-order formula. Sahlqvist's definition characterizes a decidable set of modal formulas with first-order correspondents. Since it is undecidable, by Chagrova's theorem, whether an arbitrary modal ...
Born in Cremona, Andrea Amati's son and Girolamo Amati's brother, Antonio worked first with his father, then with his brother, in the same workshop. With the latter, he refined his construction technique and style. For about ten years, they co-signed their works with their Latinized names: "Antonius & Hieronymus Amati"
Cello: with 'The King Violoncello' by Andrea Amati being the earliest known bass instrument of the violin family to survive. [55] Centrifugal Pump: the first machine that could be characterized as a centrifugal pump was a mud lifting machine that appeared as early as 1475 in a treatise by the Italian Renaissance engineer Francesco di Giorgio ...
For about ten years, they co-signed their works with their Latinized names: "Antonius & Hieronymus Amati". Girolamo slightly increased the size of his instruments, compared to those of his father. His son, Nicolò Amati (1596-1684), whom he trained in the workshop, was the master of Andrea Guarneri and possibly of Antonio Stradivari and ...
A formula in first-order logic with no free variable occurrences is called a first-order sentence. These are the formulas that will have well-defined truth values under an interpretation. For example, whether a formula such as Phil(x) is true must depend on what x represents.
In probability theory, the first-order second-moment (FOSM) method, also referenced as mean value first-order second-moment (MVFOSM) method, is a probabilistic method to determine the stochastic moments of a function with random input variables.