The greater-than and less-than symbols ( > and < ) were introduced by the British mathematician Thomas Harriot in his Artis Analyticae Praxis, published in 1631.
The symbol 
( greater-than or equal to) was first introduced by the French scientist Pierre Bouguer in 1734.
( greater-than or equal to) was first introduced by the French scientist Pierre Bouguer in 1734.
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