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Welcome

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Welcome!

Hello, Augochy, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

I hope you enjoy editing here and being a Wikipedian! Please sign your messages on discussion pages using four tildes (~~~~); this will automatically insert your username and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or ask your question on this page and then place {{help me}} before the question. Again, welcome! RJFJR (talk) 19:22, 14 October 2011 (UTC)[reply]

License tagging for File:2Ddim-L2norm-10site.png

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License tagging for File:2Ddim-L1norm-10site.png

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Thanks for uploading File:2Ddim-L1norm-10site.png. You don't seem to have indicated the license status of the image. Wikipedia uses a set of image copyright tags to indicate this information.

To add a tag to the image, select the appropriate tag from this list, click on this link, then click "Edit this page" and add the tag to the image's description. If there doesn't seem to be a suitable tag, the image is probably not appropriate for use on Wikipedia. For help in choosing the correct tag, or for any other questions, leave a message on Wikipedia:Media copyright questions. Thank you for your cooperation. --ImageTaggingBot (talk) 02:06, 16 January 2012 (UTC)[reply]

Your submission at Articles for creation

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Zone diagram, which you submitted to Articles for creation, has been created.

Thank you for helping improve Wikipedia!

Sumitkumarjha75 (talk) 15:46, 23 January 2012 (UTC)[reply]
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Hi. In your recent article edits, you've added some links pointing to disambiguation pages. Such links are almost always unintended, since a disambiguation page is merely a list of "Did you mean..." article titles. Read the FAQ • Join us at the DPL WikiProject.

Zone diagram (check to confirm | fix with Dab solver)
added links pointing to Fixed point, Compact, Fixed point theory, Plane and Jiri Matousek

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Hi. When you recently edited Triangle inequality, you added a link pointing to the disambiguation page Euclidean (check to confirm | fix with Dab solver). Such links are almost always unintended, since a disambiguation page is merely a list of "Did you mean..." article titles. Read the FAQ • Join us at the DPL WikiProject.

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Great Circle Route calculation

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Are you sure about the changes you made to the formula on calculating the great circle route? Accidentally I was trying the formula, as you modified it, today, and the resulting values did not match reality. Note that the previous formula (sin sin + cos cos cos(delta)) matches the worked example lower down in the Great Circle Distance page, and that the earlier formula is given many places elsewhere on the net. (For example, here: http://people.hofstra.edu/geotrans/eng/ch1en/conc1en/greatcircle.html).

I think the difference is that the spherical law of cosines, which you mimicked, uses the angles of the three edges of the triangle on the surface. But this is not what we have when we start with latitude and longitude. (I've not yet worked through the math, but I expect if you apply the spherical law of cosines, using the deltas of the latitude and longitude, then apply the normal rules for sine and cosine of sums, to elaborate the formula expressed in the lat/long frame of reference, you will find that the original formula was correct.

Bill (talk) 00:32, 6 November 2012 (UTC)[reply]

Thanks and sorry for returning to you after some much time (I don't read messages sent to me frequently). I used the spherical law of cosines while assuming measuring the latitude from the pole, as in spherical coordinates. This is done in the Wikipedia article about the spherical law of cosines. However, in geography one starts measuring the latitude from the equator, and this resulting in obtaining the formula you thought about. Anyway, my editing was reversed several hours after its creation. Augochy (talk) 22:20, 19 December 2012 (UTC)[reply]