__Section 103-01: General concepts__ | |

| 103-01-01 | | function | |

| 103-01-02 | | functional | |

| 103-01-03 | | distribution | |

| 103-01-04 | | transformation | |

| 103-01-05 | | variable | |

| 103-01-06 | | function of *n* variables | |

| 103-01-07 | | functional relation | |

| 103-01-08 | | inner product | |

| 103-01-09 | | weighted inner product | |

| 103-01-10 | | orthogonal, adj | |

| 103-01-11 | | system of orthogonal functions | |

| 103-01-12 | | interval | |

| 103-01-13 | | end-point | |

| 103-01-14 | | range | |

__Section 103-02: Means__ | |

| 103-02-01 | | mean value | |

| 103-02-02 | | root-mean-square value (1) | |

| 103-02-03 | | root-mean-square value (2) | |

| 103-02-04 | | geometric mean value | |

| 103-02-05 | | harmonic mean value | |

__Section 103-03: Distributions__ | |

| 103-03-01 | | unit step function | |

| 103-03-02 | | general unit step function | |

| 103-03-03 | | unit ramp | |

| 103-03-04 | | signum | |

| 103-03-05 | | Dirac function | |

| 103-03-06 | | unit doublet | |

__Section 103-04: Integral transformations__ | |

| 103-04-01 | | Fourier transform | |

| 103-04-02 | | Fourier transformation | |

| 103-04-03 | | inverse Fourier transform | |

| 103-04-04 | | inverse Fourier transformation | |

| 103-04-05 | | Laplace transform | |

| 103-04-06 | | Laplace transformation | |

| 103-04-07 | | inverse Laplace transform | |

| 103-04-08 | | inverse Laplace transformation | |

| 103-04-09 | | Z-transform | |

| 103-04-10 | | Z transformation | |

| 103-04-11 | | wavelet | |

| 103-04-12 | | continuous wavelet transform | |

__Section 103-05: Functions of one variable, mainly time-dependent quantities__ | |

| 103-05-01 | | steady state | |

| 103-05-02 | | transient, adj | |

| 103-05-03 | | oscillating, adj | |

| 103-05-04 | | oscillation | |

| 103-05-05 | | forced oscillation | |

| 103-05-06 | | free oscillation | |

| 103-05-07 | | resonance | |

| 103-05-08 | | cycle | |

| 103-05-09 | | periodic, adj | |

| 103-05-10 | | aperiodic, adj | |

| 103-05-11 | | relaxation oscillation | |

| 103-05-12 | | instantaneous value | |

| 103-05-13 | | local maximum | |

| 103-05-14 | | local maximum value | |

| 103-05-15 | | global maximum value | |

| 103-05-16 | | local minimum | |

| 103-05-17 | | local minimum value | |

| 103-05-18 | | global minimum value | |

| 103-05-19 | | peak-to-valley value | |

| 103-05-20 | | pulse | |

| 103-05-21 | | pulse train | |

| 103-05-22 | | pulsed quantity | |

| 103-05-23 | | damped oscillation | |

| 103-05-24 | | damping coefficient | |

| 103-05-25 | | logarithmic decrement | |

| 103-05-26 | | time constant | |

| 103-05-27 | | synchronous, adj | |

__Section 103-06: Periodic quantities__ | |

| 103-06-01 | | period | |

| 103-06-02 | | frequency | |

| 103-06-03 | | alternating, adj | |

| 103-06-04 | | symmetrical alternating quantity | |

| 103-06-05 | | direct component | |

| 103-06-06 | | alternating component | |

| 103-06-07 | | pulsating, adj | |

| 103-06-08 | | positive half-wave | |

| 103-06-09 | | negative half-wave | |

| 103-06-10 | | rectified value | |

| 103-06-11 | | pulsating factor | |

| 103-06-12 | | rms-ripple factor | |

| 103-06-13 | | peak-ripple factor | |

| 103-06-14 | | form factor | |

| 103-06-15 | | peak factor | |

| 103-06-16 | | beat | |

| 103-06-17 | | beat frequency | |

__Section 103-07: Sinusoidal quantities__ | |

| 103-07-01 | | sinusoidal, adj | |

| 103-07-02 | | amplitude | |

| 103-07-03 | | angular frequency | |

| 103-07-04 | | phase | |

| 103-07-05 | | initial phase | |

| 103-07-06 | | phase difference | |

| 103-07-07 | | phase lead | |

| 103-07-08 | | phase lag | |

| 103-07-09 | | in phase | |

| 103-07-10 | | in quadrature | |

| 103-07-11 | | in opposition | |

| 103-07-12 | | instantaneous complex value | |

| 103-07-13 | | complex amplitude | |

| 103-07-14 | | phasor | |

| 103-07-15 | | space phasor | |

| 103-07-16 | | complex angular frequency | |

| 103-07-17 | | growth coefficient | |

| 103-07-18 | | Fourier series | |

| 103-07-19 | | fundamental component | |

| 103-07-20 | | reference fundamental component | |

| 103-07-21 | | fundamental frequency | |

| 103-07-22 | | reference fundamental frequency | |

| 103-07-23 | | fundamental factor | |

| 103-07-24 | | harmonic order | |

| 103-07-25 | | harmonic component | |

| 103-07-26 | | harmonic frequency | |

| 103-07-27 | | interharmonic component | |

| 103-07-28 | | interharmonic frequency | |

| 103-07-29 | | sub-harmonic component | |

| 103-07-30 | | sub-harmonic frequency | |

| 103-07-31 | | harmonic content | |

| 103-07-32 | | total harmonic factor | |

__Section 103-08: Probability__ | |

| 103-08-01 | | random, adj | |

| 103-08-02 | | probability | |

| 103-08-03 | | random variable | |

| 103-08-04 | | random function | |

| 103-08-05 | | stationary random function | |

| 103-08-06 | | ergodic, adj | |

| 103-08-07 | | probability distribution | |

| 103-08-08 | | distribution function | |

| 103-08-09 | | probability density | |

| 103-08-10 | | expectation, <of a random variable> | |

| 103-08-11 | | variance, <of a random variable> | |

| 103-08-12 | | variance, <in statistics> | |

| 103-08-13 | | standard deviation | |

| 103-08-14 | | *p*-fractile, <of a probability distribution>
| |

| 103-08-15 | | median | |

| 103-08-16 | | variation coefficient | |

__Section 103-09: Spectrum__ | |

| 103-09-01 | | frequency band | |

| 103-09-02 | | frequency bandwidth | |

| 103-09-03 | | spectrum | |

| 103-09-04 | | power spectrum | |

| 103-09-05 | | power spectral density | |

| 103-09-06 | | correlation function | |

| 103-09-07 | | autocorrelation function | |

| 103-09-08 | | crosscorrelation function | |

__Section 103-10: Mathematical concepts related to waves__ | |

| 103-10-01 | | wave | |

| 103-10-02 | | waveform | |

| 103-10-03 | | sinusoidal wave | |

| 103-10-04 | | wavefront | |

| 103-10-05 | | direction of propagation | |

| 103-10-06 | | plane wave | |

| 103-10-07 | | longitudinal wave | |

| 103-10-08 | | transverse wave | |

| 103-10-09 | | wave vector | |

| 103-10-10 | | wavelength | |

| 103-10-11 | | wavenumber | |

| 103-10-12 | | angular wavenumber | |

| 103-10-13 | | phase velocity | |

| 103-10-14 | | dispersive, adj | |

| 103-10-15 | | group velocity | |

| 103-10-16 | | forward wave | |

| 103-10-17 | | backward wave | |

| 103-10-18 | | propagation coefficient | |

| 103-10-19 | | attenuation coefficient | |

| 103-10-20 | | phase coefficient | |

| 103-10-21 | | geometric optics | |

| 103-10-22 | | incident wave | |

| 103-10-23 | | diffracted wave | |

| 103-10-24 | | refracted wave | |

| 103-10-25 | | reflected wave | |

| 103-10-26 | | coherence | |

| 103-10-27 | | phase interference | |

| 103-10-28 | | standing wave | |

| 103-10-29 | | node, <of a standing wave> | |

| 103-10-30 | | antinode | |