Ranitidine, previously sold under the brand name Zantac among others, is a medication used to decrease stomach acid production. It was commonly used in...

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does not change if m and n are exchanged, it is sufficient to let this quantor extend just over m , n : m < n {\displaystyle m,n:m<n} . For simplification...

which involves partial functions (or binary relationships) or existential quantors − see e.g. Euclidean geometry where the existence of points or lines is...