17 Drummond Place,
My dear Sir,
On looking at Salmon, I find I was quite right. If U be a homogeneous function of any number of variables its Hessian is [maths expressions between two vertical lines]
Hence make the given expression homogeneous & we have
U = 4x3 + 9x2y + 18xy2 + 17y3
and the Hessian is [mathematical expressions between two vertical lines]
wh, by putting y = 1 & neglecting the numerical factor, becomes
[mathematical expression] (4x+3)(6x+17) - (3x+6y)2 as in the [text?].
P. G. Tait.
H. F. Talbot Esqre
Envelope:[in another hand: Matte matie?]
H. Fox Talbot Esqre.
13 Great Stuart Street.
[Postmark:] 60 Edinburgh AP 11 71