18-letter words containing t, e, m
- x-ray spectrometry — the use of an x-ray spectrometer.
- xml template pages — (web) (XTP) JSP transformed by XSL stylesheets. An XTP page is basically a JSP page which specifies an XSL stylesheet. The XSL specifies how selected tags in the XTP page should be rewritten. All other tags are passed through unchanged and so treated as standard JSP. JSP programmers can use XTP used as an easy introduction to XSL, incrementally applying styles to their pages.
- zermelo set theory — (mathematics) A set theory with the following set of axioms: Extensionality: two sets are equal if and only if they have the same elements. Union: If U is a set, so is the union of all its elements. Pair-set: If a and b are sets, so is {a, b}. Foundation: Every set contains a set disjoint from itself. Comprehension (or Restriction): If P is a formula with one free variable and X a set then {x: x is in X and P(x)}. is a set. Infinity: There exists an infinite set. Power-set: If X is a set, so is its power set. Zermelo set theory avoids Russell's paradox by excluding sets of elements with arbitrary properties - the Comprehension axiom only allows a property to be used to select elements of an existing set.