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left only brace

  • Syntax: \left{...\right.  (note the dot at the end!)
  • Ex.: $$f(x)=\left{{x^2, \rm~if x>-1\atop~0, \rm~else}\right.$$ gives

f(x)=\left{{x^2, \rm~if x>-1\atop~0, \rm~else}\right.

(\rm~something switches to roman style)

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