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9 votes
0 answers
89 views

When could a diligent calculus student compute all Picard iterates algebraically?

As is well known, in the typical proof of the Picard–Lindelöf theorem, one shows the existence of a solution of the initial value problem $y'(t) = f(t,y(t))$, $y(t_0) = y_0$ by considering the Picard ...
James E Hanson's user avatar
5 votes
0 answers
99 views

Differential equations analogue of fundamental theorem of symmetric functions

In Gian-Carlo Rota's article "Ten Lessons I Wish I Had Learned Before I Started Teaching Differential Equations", at the end of the third lesson he states a theorem: "Every differential ...
Ryan's user avatar
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4 votes
0 answers
81 views

Reference request, or maybe not really a reference request, on differential algebra

Of differential algebra, Gian-Carlo Rota wrote: No elementary presentation of this beautiful subject has ever been attempted, to the best of my knowledge; Cohen’s book of the twenties is the closest, ...
Michael Hardy's user avatar
2 votes
0 answers
36 views

Is there an extension of the Kovacic algorithm to handle algebraic coefficients?

Kovacic's algorithm solves second-order linear homogeneous differential equations with rational function coefficients. I'm wondering if anybody has extended this algorithm to handle algebraic ...
Brent Baccala's user avatar
1 vote
0 answers
1k views

Are all solutions to an ordinary differential equation continuous solutions to the associated implied differential equation and vice versa?

Now I have to heavily emphasize the fact that I have never studied differential algebra or the concept of other types of differentiation (which is what I believe is the concept behind a differential ...
user64742's user avatar
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