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Hace 12 horas · Quantum gravity is expected to have no exact global symmetries, which forbids constant Fayet–Iliopoulos terms as these can only arise if there are exact unbroken global () symmetries. This is seen in string theory compactifications, which can at most produce field dependent Fayet–Iliopoulos terms associated to Stueckelberg masses for gauged U ( 1 ) {\displaystyle {\text{U}}(1)} symmetries.
Hace 12 horas · arxiv-daily Initializing search Rese1F
Hace 12 horas · Android长按apk，项目中遇见一个奇怪的需求就是SeekBar不可点击，可长按和拉着拖拽点拖动。一开始想着很简单嘛。屏蔽吊点击事件，SeekBar自带长按事件，差不多就搞定了，然而是我太天真啊，SeekBar自带的长按监听是无效的。我通过网上查寻资料有一些简单的方法实现不可单击的有实现长按的，然后 ...
