reciprocity law.
mathematical law, a generalization of quadratic reciprocity
Brazil Rejects US Tariffs, Plans WTO Challenge
Brazil denounced the United States’ 12.5% tariffs on its exports and 59 other trading partners as completely arbitrary and unjustified, saying Washington lacks a legal basis and is using human-rights concerns to advance protectionism. Brasília pledged immediate retaliation under its Reciprocity Law and to take the dispute to the WTO, while Lula signaled willingness to negotiate but warned Brazil will seek alternative markets if needed.
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About reciprocity law
In mathematics, a reciprocity law is a generalization of the law of quadratic reciprocity to arbitrary monic irreducible polynomials with integer coefficients. Recall that first reciprocity law, quadratic reciprocity, determines when an irreducible polynomial splits into linear terms when reduced mod . That is, it determines for which prime numbers the relation
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