ಚಿತ್ರ:Twocolumnproof.png
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Twocolumnproof.png (೪೩೭ × ೪೦೪ ಚಿತ್ರಬಿಂದು, ಫೈಲಿನ ಗಾತ್ರ: ೧೫೬ KB, MIME ಪ್ರಕಾರ: image/png)
ಸಾರಾಂಶ
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English: Taken from Patricio G. Herbst, "Establishing a Custom of Proving in American School Geometry: Evolution of the Two-Column Proof in the Early Twentieth Century", Educational Studies in Mathematics, Vol. 49, No. 3 (2002), pp. 283-312. Herbst says, "Photographed by the author from Schulze and Sevenoak, 1913, p. 53, Macmillan publishers."
This paper is available from https://www.jstor.org/stable/3483034 |
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1930, and if not then due to lack of notice or renewal. See this page for further explanation.
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Original upload log
The original description page was here. All following user names refer to en.wikipedia.
- 2008-10-05 20:37 CBM 437×404× (159952 bytes) {{PD-us}} == Source == Taken from Patricio G. Herbst, "Establishing a Custom of Proving in American School Geometry: Evolution of the Two-Column Proof in the Early Twentieth Century", ''Educational Studies in Mathematics'', Vol. 49, No. 3 (2002), pp. 28
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ದಿನ/ಕಾಲ ಒತ್ತಿದರೆ ಆ ಸಮಯದಲ್ಲಿ ಈ ಕಡತದ ವಸ್ತುಸ್ಥಿತಿ ತೋರುತ್ತದೆ.
| ದಿನ/ಕಾಲ | ಕಿರುನೋಟ | ಆಯಾಮಗಳು | ಬಳಕೆದಾರ | ಟಿಪ್ಪಣಿ | |
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| ಪ್ರಸಕ್ತ | ೦೫:೩೨, ೨೫ ಜುಲೈ ೨೦೦೯ | | ೪೩೭ × ೪೦೪ (೧೫೬ KB) | wikimediacommons>File Upload Bot (Magnus Manske) | {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Taken from Patricio G. Herbst, "Establishing a Custom of Proving in American School Geometry: Evolution |
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