Gradient (English Wikipedia)

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

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1mathinsight.org

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archive.org (Global: 6^th place; English: 6^th place)

Kreyszig (1972, pp. 308–309) Kreyszig, Erwin (1972), Advanced Engineering Mathematics (3rd ed.), New York: Wiley, ISBN 0-471-50728-8
Schey 1992, pp. 139–142. Schey, H. M. (1992). Div, Grad, Curl, and All That (2nd ed.). W. W. Norton. ISBN 0-393-96251-2. OCLC 25048561.
Beauregard & Fraleigh (1973, pp. 87, 248) Beauregard, Raymond A.; Fraleigh, John B. (1973), A First Course In Linear Algebra: with Optional Introduction to Groups, Rings, and Fields, Boston: Houghton Mifflin Company, ISBN 0-395-14017-X
Kreyszig (1972, pp. 333, 353, 496) Kreyszig, Erwin (1972), Advanced Engineering Mathematics (3rd ed.), New York: Wiley, ISBN 0-471-50728-8

doi.org (Global: 2^nd place; English: 2^nd place)

T. Arens (2022). Mathematik (5th ed.). Springer Spektrum Berlin. doi:10.1007/978-3-662-64389-1. ISBN 978-3-662-64388-4.

loc.gov (Global: 70^th place; English: 63^rd place)

lccn.loc.gov

Protter & Morrey (1970, pp. 21, 88) Protter, Murray H.; Morrey, Charles B. Jr. (1970), College Calculus with Analytic Geometry (2nd ed.), Reading: Addison-Wesley, LCCN 76087042

mathinsight.org (Global: low place; English: low place)

"Non-differentiable functions must have discontinuous partial derivatives - Math Insight". mathinsight.org. Retrieved 2023-10-21.

worldcat.org (Global: 5^th place; English: 5^th place)

search.worldcat.org

Schey 1992, pp. 139–142. Schey, H. M. (1992). Div, Grad, Curl, and All That (2nd ed.). W. W. Norton. ISBN 0-393-96251-2. OCLC 25048561.