What are the viscosity values of coal tar pitch?

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Is it true that $\det(V(A))$ may be only $\pm 1$, depending on $n$, for the last symmetric tridiagonal matrix $A$?

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Alexander J. Babchin

I would compare this case with viscosity of Athabasca Bitumen. Viscosity of bithumen is about 1 million cP at room temperature, falling to 3 cP at 250 C.

Mushtaq Ahmad

Viscosity versus temperature graph is attached. It may help to some extent.

Andrzej Mianowski

I found publication, in polish language, coal tar pitch = pak węglowy