Open mjungmath opened 3 years ago
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@@ -1,6 +1,6 @@
As pointed out in #25034 and https://groups.google.com/g/sage-devel/c/IDtiGF6HB28/m/QWwnAeLJBAAJ there is currently a conflict of conventions.
-The implementation is in line https://mathworld.wolfram.com/AssociatedLegendrePolynomial.html now, but as mentioned above this source seems to be flawed and a distinction has to be made.
+The current implementation is in line https://mathworld.wolfram.com/AssociatedLegendrePolynomial.html now, but as mentioned above this source seems to be flawed and a distinction to Ferrers functions has to be made.
There are a few references to consider:
Description changed:
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@@ -1,8 +1,8 @@
As pointed out in #25034 and https://groups.google.com/g/sage-devel/c/IDtiGF6HB28/m/QWwnAeLJBAAJ there is currently a conflict of conventions.
-The current implementation is in line https://mathworld.wolfram.com/AssociatedLegendrePolynomial.html now, but as mentioned above this source seems to be flawed and a distinction to Ferrers functions has to be made.
+The current implementation is in line with https://mathworld.wolfram.com/AssociatedLegendrePolynomial.html, but as mentioned above this source seems to be flawed and a distinction to Ferrers functions needs to be made (cf. https://dlmf.nist.gov/14.21#i.p1 and https://dlmf.nist.gov/14.3#E1).
-There are a few references to consider:
+Here are a few references to consider:
- https://mathworld.wolfram.com/AssociatedLegendrePolynomial.html (probably flawed?)
- https://dlmf.nist.gov/14.3#E1
Description changed:
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+++
@@ -1,11 +1,11 @@
As pointed out in #25034 and https://groups.google.com/g/sage-devel/c/IDtiGF6HB28/m/QWwnAeLJBAAJ there is currently a conflict of conventions.
-The current implementation is in line with https://mathworld.wolfram.com/AssociatedLegendrePolynomial.html, but as mentioned above this source seems to be flawed and a distinction to Ferrers functions needs to be made (cf. https://dlmf.nist.gov/14.21#i.p1 and https://dlmf.nist.gov/14.3#E1).
+The current implementation is in line with [1], but as mentioned above this source seems to be flawed and a distinction to Ferrers functions needs to be made (cf. [2] and [3]).
Here are a few references to consider:
-- https://mathworld.wolfram.com/AssociatedLegendrePolynomial.html (probably flawed?)
-- https://dlmf.nist.gov/14.3#E1
-- https://dlmf.nist.gov/14.21#i.p1
-- https://en.wikipedia.org/wiki/Associated_Legendre_polynomials
-- http://www.math.ubc.ca/~cbm/aands/page_332.htm
+- [1]: https://mathworld.wolfram.com/AssociatedLegendrePolynomial.html (probably flawed?)
+- [2]: https://dlmf.nist.gov/14.3#E1
+- [3]: https://dlmf.nist.gov/14.21#i.p1
+- [4]: https://en.wikipedia.org/wiki/Associated_Legendre_polynomials
+- [5]: http://www.math.ubc.ca/~cbm/aands/page_332.htm
Description changed:
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+++
@@ -1,11 +1,14 @@
As pointed out in #25034 and https://groups.google.com/g/sage-devel/c/IDtiGF6HB28/m/QWwnAeLJBAAJ there is currently a conflict of conventions.
The current implementation is in line with [1], but as mentioned above this source seems to be flawed and a distinction to Ferrers functions needs to be made (cf. [2] and [3]).
+
+More precisely, we want to implement solutions of the ODE [4]. There are solutions on (-1,1) called "Ferrers functions" [2] and solutions on (1,oo) which can be extended to the complex plane [3]. This distinction has not been made yet but yields to different formulas in different cases.
Here are a few references to consider:
- [1]: https://mathworld.wolfram.com/AssociatedLegendrePolynomial.html (probably flawed?)
- [2]: https://dlmf.nist.gov/14.3#E1
- [3]: https://dlmf.nist.gov/14.21#i.p1
-- [4]: https://en.wikipedia.org/wiki/Associated_Legendre_polynomials
-- [5]: http://www.math.ubc.ca/~cbm/aands/page_332.htm
+- [4]: https://dlmf.nist.gov/14.2#E2
+- [5]: https://en.wikipedia.org/wiki/Associated_Legendre_polynomials
+- [6]: http://www.math.ubc.ca/~cbm/aands/page_332.htm
Description changed:
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@@ -2,7 +2,7 @@
The current implementation is in line with [1], but as mentioned above this source seems to be flawed and a distinction to Ferrers functions needs to be made (cf. [2] and [3]).
-More precisely, we want to implement solutions of the ODE [4]. There are solutions on (-1,1) called "Ferrers functions" [2] and solutions on (1,oo) which can be extended to the complex plane [3]. This distinction has not been made yet but yields to different formulas in different cases.
+More precisely, we want to implement solutions of the ODE [4]. There are solutions on (-1,1) called "Ferrers functions" [2] and solutions on (1,oo), which can be extended to the complex plane [3]. This distinction has not been made yet but yields to different formulas in different cases. The current formulas favor the Ferrers functions.
Here are a few references to consider:
Description changed:
---
+++
@@ -2,7 +2,7 @@
The current implementation is in line with [1], but as mentioned above this source seems to be flawed and a distinction to Ferrers functions needs to be made (cf. [2] and [3]).
-More precisely, we want to implement solutions of the ODE [4]. There are solutions on (-1,1) called "Ferrers functions" [2] and solutions on (1,oo), which can be extended to the complex plane [3]. This distinction has not been made yet but yields to different formulas in different cases. The current formulas favor the Ferrers functions.
+More precisely, we want to implement solutions of the ODE [4]. There are solutions on (-1,1) called "Ferrers functions" [2] and solutions on (1,oo) which can be extended to the complex plane without the slit `(-oo,1]` [3]. This distinction has not been made yet but yields to different formulas in different cases. The current formulas favor the Ferrers functions.
Here are a few references to consider:
I see three options here:
ferrers_func
and gen_legendre_P
.I advocate the latter option since it leads to less confusion for the end-user (and developer).
Other than that, implementing connection formulas to Legendre (Ferrers) functions of second kind are also desirable.
Dependencies: #25034
As pointed out in #25034 and https://groups.google.com/g/sage-devel/c/IDtiGF6HB28/m/QWwnAeLJBAAJ there is currently a conflict of conventions.
The current implementation is in line with [1], but as mentioned above this source seems to be flawed and a distinction to Ferrers functions needs to be made (cf. [2] and [3]).
More precisely, we want to implement solutions of the ODE [4]. There are solutions on (-1,1) called "Ferrers functions" [2] and solutions on (1,oo) which can be extended to the complex plane without the slit
(-oo,1]
[3]. This distinction has not been made yet but yields to different formulas in different cases. The current formulas favor the Ferrers functions.Here are a few references to consider:
Depends on #25034
CC: @sagetrac-jcwomack @slel @egourgoulhon
Component: misc
Issue created by migration from https://trac.sagemath.org/ticket/31637