Example image of eyePlorer eyePlorer map for 'Absolute value': Mathematics Negative and non-negative numbers Real number Complex number Ordered ring Quaternion Vector space Distance Magnitude (mathematics) Norm (mathematics) Jean-Robert Argand Karl Weierstrass 0 (number) Vertical bar Cardinality Analytic geometry Real line Metric (mathematics) Multiplicative function Subadditivity Ordered set Complex plane Origin (mathematics) Pythagorean theorem Complex conjugate Endomorphism Multiplicative group Continuous function Derivative Monotonic function Even and odd functions Inverse element Cauchy–Riemann equations Idempotence Additive inverse Identity element Euclidean distance Euclidean space Sign function Subderivative Heaviside step function Absolute value (algebra) Ultrametric space Bounded set Archimedean property Inner product space Euclidean geometry C (programming language) Math.h Floating point