EXPONENTIAL SOLUTION OF A DIFFERENTIAL EQUATION BETWEEN OPERATORS
In this paper we obtain an authentically exponential
solution to the differential equation dY (t)/ dt = A(t)Y (t), where Y (t) and A(t)
are linear operators with the initial condition Y (0) = I, and I is the identity
operator. Then, the solution was applied to calculate the vector triad: tangent,
normal and binormal in terms of the arc length of a curve.
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