Education
He then went to Heidelberg where he studied with Otto Hesse.
(This historic book may have numerous typos and missing te...)
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...the division therefore belonging to this multiplication is not a unique operation. The geometrical meaning of the theorem is: Parallelograms on the same base and between the same parallels are equal. If the area and base are given, the other side may be any vector drawn between the parallels. The student should be careful to notice that from the equation aft = ay it does not follow that /3 = 7, but, supposing that a == 0, ft = y + ma where m is any scalar. The equation can also be written aft-y = 0, which as we have seen is only true if either a = 0, or ft = y, ovft--ya. The latter says ft--y--ma as above. If however a/3 = ay shall be true whatever a may be, then of necessity ft' = y, because ft--y cannot be parallel to two different directions. The two equations a0 = 07, a'ft = a'y, where a and a are not parallel, can only be true if ft = y. Such reasoning enables us to dispense with the operation of Division by Vectors. This operation is complicated and will not be considered at all. It leads to the much more complicated Theory of Quaternions. 130. The remainder of this chapter will be devoted to various direct applications of the preceding theory to Pure and to Coordinate Geometry, &c. A number of illustrative examples will be worked in order to shew the manner in which problems should be attacked vectorially. The chapters on Rotors and Stress diagrams may however be taken before reading the remainder of the chapter. 131. Let a and /3 denote the adjacent sides of any parallelogram as vectors, then the diagonals are a+/3 and o-/3. Now a+01 a-/3=aa-a/3 + /3a-0/3 = 2 fia. (Notice that unless the proper order of the vectors had been retained in the multiplication, the third term might have cancelled with the second.) This result says:--the area of any pa...
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mathematician university professor
He then went to Heidelberg where he studied with Otto Hesse.
After three years as an apprentice in engineering, Henrici entered Karlsruhe Polytechnium where he came under the influence of Alfred Clebsch who encouraged him in mathematics. degree on 6 June 1863 at University of Heidelberg. He continued his studies in Berlin with Karl Weierstrass and Leopold Kronecker. He was briefly docent of mathematics and physics at the University of Kiel, but ran into financial difficulties.
Henrici moved to London in 1865 where he worked as a private tutor.
In 1869 Hesse introduced him to J. J. Sylvester who in turn brought him into contact with Arthur Cayley, William Kingdon Clifford, and Thomas Archer Hirst. lieutenant was Hirst that gave him some work at University College London.
Henrici also became a professor at Bedford College. When Hirst fell ill, Henrici filled his position at University College.
He held the position until 1884, turning to applied mathematics after 1880.
From 1882 to 1884 Henrici was President of the London Mathematical Society. In 1884 he moved to Central Technical College where he directed a Laboratory of Mechanics which included calculating machines, planimeters, moment integrators, and a harmonic analyzer. Henrici was impressed by the work of Robert Stawell Ball in screw theory as presented in a German textbook by Gravelius.
In 1890 Henrici wrote a book review for Nature outlining the program of the theory.
In 1911 he retired and took up gardening at Chandler"s Ford in Hampshire.
(This historic book may have numerous typos and missing te...)
Royal Society.