31. Double Robotics received seed funding from Y Combinator . 32. It was financed by a Kickstarter fundraising campaign and subsequently backed by Y Combinator . 33. In December 2013, AirPair was accepted into the Winter 2014 Y Combinator batch. 34. In January 2015 TeamNote joined the renowned Silicon Valley accelerator Y Combinator as incubatee. 35. Cade Metz of " Y Combinator companies will share their data with OpenAI. 36. These combinators are extremely useful when translating predicate logic or lambda calculus into combinator expressions. 37. However it is safe to consider the Y combinator when defined in mathematic logic only. 38. The Y combinator allows rewrite rules, without requiring native recursion support in the language. 39. The Combinator calculus is such a model. 40. Kickback integrates on top of popular existing games, where the service adds Y Combinator .