JKN abb

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Image copyright problem with Image:DTC block diagram.JPG

Image Copyright problem

Thank you for uploading Image:DTC block diagram.JPG. However, it currently is missing information on its copyright status. Wikipedia takes copyright very seriously. It may be deleted soon, unless we can determine the license and the source of the image. If you know this information, then you can add a copyright tag to the image description page.

If you have any questions, please feel free to ask them at the media copyright questions page. Thanks again for your cooperation. Sdrtirs (talk) 18:12, 7 August 2008 (UTC)

Image without license

Unspecified source/license for Image:DTC block diagram.JPG

Thanks for uploading Image:DTC block diagram.JPG. The image has been identified as not specifying the copyright status of the image, which is required by Wikipedia's policy on images. Even if you created the image yourself, you still need to release it so Wikipedia can use it. If you don't indicate the copyright status of the image on the image's description page, using an appropriate copyright tag, it may be deleted some time in the next seven days. If you made this image yourself, you can use copyright tags like {{PD-self}} (to release all rights), {{self|CC-by-sa-3.0|GFDL}} (to require that you be credited), or any tag here - just go to the image, click edit, and add one of those. If you have uploaded other images, please verify that you have provided copyright information for them as well.

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This is an automated notice by MifterBot. For assistance on the image use policy, see Wikipedia:Media copyright questions. NOTE: once you correct this, please remove the tag from the image's page. --MifterBot ^{(Talk • Contribs • Owner)} 15:41, 8 August 2008 (UTC)

File permission problem with File:ABB VFD Family.jpg

File Copyright problem

Thanks for uploading File:ABB VFD Family.jpg. I noticed that while you provided a valid copyright licensing tag, there is no proof that the creator of the file agreed to license it under the given license.

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If you have uploaded other files, consider checking that you have provided evidence that their copyright owners have agreed to license their works under the tags you supplied, too. You can find a list of files you have uploaded by following this link. Files lacking evidence of permission may be deleted one week after they have been tagged, as described on criteria for speedy deletion. If you have any questions please ask them at the Media copyright questions page. Thank you. Skier Dude (talk) 03:50, 3 October 2009 (UTC)

symplectic Euler method

Regarding your addition of the stability region: The cited article is not available online. If you have it present, could you please expand on the methodology that produced the diagram? The stability region for Runge-Kutta or multistep methods are derived from the study of the scalar equation $y'=\lambda y$. What class of linear differential equations (of order 2 or as 2D system or derived from a Hamiltonian function) is used for symplectic integrators? Additionally, one may ask: Are they Hamiltonian? What is stability for a method that preserves an (modified) energy functional?--LutzL (talk) 17:52, 7 November 2013 (UTC)