在抽象代数中，有序环是一个（通常是交换的）环R，存在全序≤，使得对于R中的所有a、b和c：[1]
如果a ≤ b，则a + c ≤ b + c。 如果0 ≤ a和0 ≤ b，那么0 ≤ ab。
参考文献
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