For Stilfold, the advantage of doing this with metal is to strengthen that material without requiring lots of brackets, screws or supports – reducing the overall volume of material required, and therefore also the cost and embodied carbon emissions of any product made with the technique. "We can achieve about 20-30% material reduction just by adding stiffness," says Nyvang.
“我家7孔闲窑租出去，由旅游公司统一装修、统一经营，每年租金1万多。我在酒店做保洁，月薪3600元。”村民张芳芳一口陕北话脆生生。她口中的旅游公司，负责人叫于丽，从重庆来到延安投资。“看准的，就是红色旅游的好前景！”于丽说。
，这一点在爱思助手下载最新版本中也有详细论述
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AcknowledgementsWe gratefully acknowledge the support of DARPA's expMath program. We are also grateful to all our collaborators from the Lean community, led by Chris Birkbeck, Sidharth Hariharan, Seewoo Lee, Bhavik Mehta and Maryna Viazovska, and acknowledge the invaluable support of Jeremy Avigad, Kevin Buzzard, David Loeffler, Gareth Ma, Pietro Monticone, the Mathlib maintainers and the Institute for Computer-Aided Reasoning in Mathematics.