Mollifier (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Mollifier" in English language version.

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Friedrichs (1953, p. 196). Friedrichs, Kurt Otto (1953), "On the differentiability of the solutions of linear elliptic differential equations", Communications on Pure and Applied Mathematics, VI (3): 299–326, doi:10.1002/cpa.3160060301, MR 0058828, Zbl 0051.32703, archived from the original on 2013-01-05. A paper where the differentiability of solutions of elliptic partial differential equations is investigated by using mollifiers.
See (Giusti 1984, p. 11). Giusti, Enrico (1984), Minimal surfaces and functions of bounded variations, Monographs in Mathematics, vol. 80, Basel-Boston-Stuttgart: Birkhäuser Verlag, pp. xii+240, ISBN 0-8176-3153-4, MR 0775682, Zbl 0545.49018.
See (Hörmander 1990, p. 14), lemma 1.2.3.: the example is stated in implicit form by first defining
$f(t)=\exp({-1/t})$ for $t\in \mathbb {R} _{+}$ ,
and then considering
$f(x)=f{\big (}1-|x|^{2}{\big )}=\exp {\big (}1-|x|^{2}{\big )}$ for $x\in \mathbb {R} ^{n}$ .
Hörmander, Lars (1990), The analysis of linear partial differential operators I, Grundlehren der Mathematischen Wissenschaft, vol. 256 (2nd ed.), Berlin-Heidelberg-New York: Springer-Verlag, ISBN 0-387-52343-X, MR 1065136, Zbl 0712.35001.
See for example (Hörmander 1990). Hörmander, Lars (1990), The analysis of linear partial differential operators I, Grundlehren der Mathematischen Wissenschaft, vol. 256 (2nd ed.), Berlin-Heidelberg-New York: Springer-Verlag, ISBN 0-387-52343-X, MR 1065136, Zbl 0712.35001.
A proof of this fact can be found in (Hörmander 1990, p. 25), Theorem 1.4.1. Hörmander, Lars (1990), The analysis of linear partial differential operators I, Grundlehren der Mathematischen Wissenschaft, vol. 256 (2nd ed.), Berlin-Heidelberg-New York: Springer-Verlag, ISBN 0-387-52343-X, MR 1065136, Zbl 0712.35001.

archive.today

Friedrichs (1953, p. 196). Friedrichs, Kurt Otto (1953), "On the differentiability of the solutions of linear elliptic differential equations", Communications on Pure and Applied Mathematics, VI (3): 299–326, doi:10.1002/cpa.3160060301, MR 0058828, Zbl 0051.32703, archived from the original on 2013-01-05. A paper where the differentiability of solutions of elliptic partial differential equations is investigated by using mollifiers.

books.google.com

See the commentary of Peter Lax on the paper (Friedrichs 1944) in (Friedrichs 1986, volume 1, p. 117). Friedrichs, Kurt Otto (1986), Morawetz, Cathleen S. (ed.), Selecta, Contemporary Mathematicians, Boston-Basel-Stuttgart: Birkhäuser Verlag, pp. 427 (Vol. 1), pp. 608 (Vol. 2), ISBN 0-8176-3270-0, Zbl 0613.01020. A selection from Friedrichs' works with a biography and commentaries of David Isaacson, Fritz John, Tosio Kato, Peter Lax, Louis Nirenberg, Wolfgag Wasow, Harold Weitzner.
(Friedrichs 1986, volume 1, p. 117) Friedrichs, Kurt Otto (1986), Morawetz, Cathleen S. (ed.), Selecta, Contemporary Mathematicians, Boston-Basel-Stuttgart: Birkhäuser Verlag, pp. 427 (Vol. 1), pp. 608 (Vol. 2), ISBN 0-8176-3270-0, Zbl 0613.01020. A selection from Friedrichs' works with a biography and commentaries of David Isaacson, Fritz John, Tosio Kato, Peter Lax, Louis Nirenberg, Wolfgag Wasow, Harold Weitzner.
In (Friedrichs 1986, volume 1, p. 117) Lax writes "On English usage Friedrichs liked to consult his friend and colleague, Donald Flanders, a descendant of puritans and a puritan himself, with the highest standard of his own conduct, noncensorious towards others. In recognition of his moral qualities he was called Moll by his friends. When asked by Friedrichs what to name the smoothing operator, Flanders remarked that they could be named "mollifier" after himself; Friedrichs was delighted, as on other occasions, to carry this joke into print." Friedrichs, Kurt Otto (1986), Morawetz, Cathleen S. (ed.), Selecta, Contemporary Mathematicians, Boston-Basel-Stuttgart: Birkhäuser Verlag, pp. 427 (Vol. 1), pp. 608 (Vol. 2), ISBN 0-8176-3270-0, Zbl 0613.01020. A selection from Friedrichs' works with a biography and commentaries of David Isaacson, Fritz John, Tosio Kato, Peter Lax, Louis Nirenberg, Wolfgag Wasow, Harold Weitzner.
See (Giusti 1984, p. 11). Giusti, Enrico (1984), Minimal surfaces and functions of bounded variations, Monographs in Mathematics, vol. 80, Basel-Boston-Stuttgart: Birkhäuser Verlag, pp. xii+240, ISBN 0-8176-3153-4, MR 0775682, Zbl 0545.49018.

doi.org

Friedrichs (1953, p. 196). Friedrichs, Kurt Otto (1953), "On the differentiability of the solutions of linear elliptic differential equations", Communications on Pure and Applied Mathematics, VI (3): 299–326, doi:10.1002/cpa.3160060301, MR 0058828, Zbl 0051.32703, archived from the original on 2013-01-05. A paper where the differentiability of solutions of elliptic partial differential equations is investigated by using mollifiers.

mathnet.ru

mi.mathnet.ru

See (Sobolev 1938). Sobolev, Sergei L. (1938), "Sur un théorème d'analyse fonctionnelle", Recueil Mathématique (Matematicheskii Sbornik) (in Russian and French), 4(46) (3): 471–497, Zbl 0022.14803. The paper where Sergei Sobolev proved his embedding theorem, introducing and using integral operators very similar to mollifiers, without naming them.

wiley.com

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Friedrichs (1953, p. 196). Friedrichs, Kurt Otto (1953), "On the differentiability of the solutions of linear elliptic differential equations", Communications on Pure and Applied Mathematics, VI (3): 299–326, doi:10.1002/cpa.3160060301, MR 0058828, Zbl 0051.32703, archived from the original on 2013-01-05. A paper where the differentiability of solutions of elliptic partial differential equations is investigated by using mollifiers.

zbmath.org

See the commentary of Peter Lax on the paper (Friedrichs 1944) in (Friedrichs 1986, volume 1, p. 117). Friedrichs, Kurt Otto (1986), Morawetz, Cathleen S. (ed.), Selecta, Contemporary Mathematicians, Boston-Basel-Stuttgart: Birkhäuser Verlag, pp. 427 (Vol. 1), pp. 608 (Vol. 2), ISBN 0-8176-3270-0, Zbl 0613.01020. A selection from Friedrichs' works with a biography and commentaries of David Isaacson, Fritz John, Tosio Kato, Peter Lax, Louis Nirenberg, Wolfgag Wasow, Harold Weitzner.
(Friedrichs 1986, volume 1, p. 117) Friedrichs, Kurt Otto (1986), Morawetz, Cathleen S. (ed.), Selecta, Contemporary Mathematicians, Boston-Basel-Stuttgart: Birkhäuser Verlag, pp. 427 (Vol. 1), pp. 608 (Vol. 2), ISBN 0-8176-3270-0, Zbl 0613.01020. A selection from Friedrichs' works with a biography and commentaries of David Isaacson, Fritz John, Tosio Kato, Peter Lax, Louis Nirenberg, Wolfgag Wasow, Harold Weitzner.
In (Friedrichs 1986, volume 1, p. 117) Lax writes "On English usage Friedrichs liked to consult his friend and colleague, Donald Flanders, a descendant of puritans and a puritan himself, with the highest standard of his own conduct, noncensorious towards others. In recognition of his moral qualities he was called Moll by his friends. When asked by Friedrichs what to name the smoothing operator, Flanders remarked that they could be named "mollifier" after himself; Friedrichs was delighted, as on other occasions, to carry this joke into print." Friedrichs, Kurt Otto (1986), Morawetz, Cathleen S. (ed.), Selecta, Contemporary Mathematicians, Boston-Basel-Stuttgart: Birkhäuser Verlag, pp. 427 (Vol. 1), pp. 608 (Vol. 2), ISBN 0-8176-3270-0, Zbl 0613.01020. A selection from Friedrichs' works with a biography and commentaries of David Isaacson, Fritz John, Tosio Kato, Peter Lax, Louis Nirenberg, Wolfgag Wasow, Harold Weitzner.
See (Sobolev 1938). Sobolev, Sergei L. (1938), "Sur un théorème d'analyse fonctionnelle", Recueil Mathématique (Matematicheskii Sbornik) (in Russian and French), 4(46) (3): 471–497, Zbl 0022.14803. The paper where Sergei Sobolev proved his embedding theorem, introducing and using integral operators very similar to mollifiers, without naming them.
Friedrichs (1953, p. 196). Friedrichs, Kurt Otto (1953), "On the differentiability of the solutions of linear elliptic differential equations", Communications on Pure and Applied Mathematics, VI (3): 299–326, doi:10.1002/cpa.3160060301, MR 0058828, Zbl 0051.32703, archived from the original on 2013-01-05. A paper where the differentiability of solutions of elliptic partial differential equations is investigated by using mollifiers.
See (Giusti 1984, p. 11). Giusti, Enrico (1984), Minimal surfaces and functions of bounded variations, Monographs in Mathematics, vol. 80, Basel-Boston-Stuttgart: Birkhäuser Verlag, pp. xii+240, ISBN 0-8176-3153-4, MR 0775682, Zbl 0545.49018.
See (Hörmander 1990, p. 14), lemma 1.2.3.: the example is stated in implicit form by first defining
$f(t)=\exp({-1/t})$ for $t\in \mathbb {R} _{+}$ ,
and then considering
$f(x)=f{\big (}1-|x|^{2}{\big )}=\exp {\big (}1-|x|^{2}{\big )}$ for $x\in \mathbb {R} ^{n}$ .
Hörmander, Lars (1990), The analysis of linear partial differential operators I, Grundlehren der Mathematischen Wissenschaft, vol. 256 (2nd ed.), Berlin-Heidelberg-New York: Springer-Verlag, ISBN 0-387-52343-X, MR 1065136, Zbl 0712.35001.
See for example (Hörmander 1990). Hörmander, Lars (1990), The analysis of linear partial differential operators I, Grundlehren der Mathematischen Wissenschaft, vol. 256 (2nd ed.), Berlin-Heidelberg-New York: Springer-Verlag, ISBN 0-387-52343-X, MR 1065136, Zbl 0712.35001.
A proof of this fact can be found in (Hörmander 1990, p. 25), Theorem 1.4.1. Hörmander, Lars (1990), The analysis of linear partial differential operators I, Grundlehren der Mathematischen Wissenschaft, vol. 256 (2nd ed.), Berlin-Heidelberg-New York: Springer-Verlag, ISBN 0-387-52343-X, MR 1065136, Zbl 0712.35001.