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.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box; } 0 After reading about it, I have some mess in my head. This function is being called while user swipe his finger on some UI element : func wasDragged() { signal here } I would like to make small Haptic signals every time it's being called ( like a dates picker wheel ) How would I setup first time and make the signals of the Haptic Engine on call ? Do I have to check for device kind ? I want it only on iPhone 7 and up. Using latest Swift. swift share | improve this question ...

3 1 $begingroup$ Given $u_n=sum_{k=1}^{infty} u_{n+k}^2$ and $sum_{n=1}^{infty}u_n$ converge. Show $u_k=0 forall k in mathbb{N}$ . Remark:This sequence is not increasing as $u_n-u_{n+1}=u_{n+1}^2geq0$ . It is bounded below by $0$ . If we can show $u_n=u_{n+1}$ , we are done. Help! real-analysis share | cite | improve this question edited Dec 12 '18 at 23:39 mathpadawan asked Dec 12 '18 at 23:31 mathpadawan mathpadawan 1,884 4 22 ...