——王璞委员（北京工业大学教授）
We get a front, 12MP Center Stage camera and a 12MP Wide camera on the back. As always, you can use Apple accessories with the device, like the Magic Keyboard, Apple Pencil, or Apple Pencil Pro.
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Let’s start with pushing. Consider a tree of nodes. If we update one of the input nodes, our goal now is to find out which child (and output) nodes need to be updated. We’re not actually going to do the updating, we’re just going to find out which ones need updating.
Benjamin Shiller of Brandeis University recently talked to Fortune about his separate research about “personalized pricing” by companies including credit card providers. “My more recent research in that vein is looking at the potential for firms to hide how they do it, to basically personalize prices without having any consumers be aware. And so that’s something that’s hard to prove,” Shiller said.