User talk:Onnovanroosmalen

Welcome!
Hello, Onnovanroosmalen, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are a few links to pages you might find helpful:


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Please remember to sign your messages on talk pages by typing four tildes ( ~ ); this will automatically insert your username and the date. If you need help, check out Questions, ask me on my talk page, or, and a volunteer should respond shortly. Again, welcome! - DVdm (talk) 08:48, 18 July 2019 (UTC)

About sources and original research
Welcome to Wikipedia. We appreciate your contributions, but in one of your recent edits to Derivations of the Lorentz transformations, it appears that you have added original research, which is against Wikipedia's policies. Original research refers to material—such as facts, allegations, ideas, and personal experiences—for which no reliable, published sources exist; it also encompasses combining published sources in a way to imply something that none of them explicitly say. Please be prepared to cite a reliable source for all of your contributions. Thank you. - DVdm (talk) 08:48, 18 July 2019 (UTC)