Parabolic differential equation

Parallel displacement of axis of rotation

Parallel displacement of force

Parallel displacement, basic properties

Parallel, oppositely directed (anti-parallel) forces

Parallelogram of motions and forces

Parametric curves on a surface

Parametric equations (with parameter *t)*
of closed plane curve

Parametric form of equation of straight line

Parametric representation, direction cosines

Parametrically represented Curves, Change of Axes

Partial derivatives of higher order

Partial derivatives of inverse functions

Partial derivatives of the second order

Partial differential coefficients

Partial differential equations

Particular solution of differential equation

Partitioning ratio of directed distances

Passage of electricity through gases

Performance of electric current

Periodic infinite decimal fraction

Periodical non-terminating continued fraction

Permutations as linear transformations

Permutations, Decomposition of

Perspectively similar figures in a plane

Perturbation theory, wave-mechanical

Physical equivalence of inertial systems

Physical meaning of scalar product

Physical-chemical conversion of a substance and its heat equivalence (heat tone)

Physically infinitesimal quantities

Physics, boundary value problems

Plane polygon in horizontal plane

Plumb-line, perpendicular to plane

Point of Accumulation, Principle of

Points of accumulation, upper/lower

Polar co-ordinates, eigen functions of dispersion problem

Polar Co-ordinates, Transformation of D*u*

Polygons with centre and centre lines

Polynomial approximation, differentiation, integration

Polynomial representation Polynomial, characteristic

Polynomial, finite differences

Polynomials in cosines and sines

Polynomials in two indeterminates

Polynomials of which A is a root

Positive and negative numbers under the root sign

Positive rotation about vector

Positively homogeneous function

Potential Theory, boundary value problem for the sphere

Potential theory, Dirichlet problem

Potential theory, Gauss' theorem of arithmetic mean

Potential theory, one-dimensional

Potential theory, two-dimensional

Potential theory, two-dimensional

Potentials at internal, external points

Power method, convergence rate

Power
series for cos *z* and sin *z*

Power Series with Complex Terms

Power Series, Differentiation/Integration

POWER SERIES, EXPANSION IN CONTINUED FRACTIONS

Power Series, Multiplication and Division

Powers with fractional exponents

^{Powers with positive and negative
exponents}

Prandtl's Boundary Layer Theory

Preliminary Remarks, Analytical Geometry / Vector Analysis

Presentation of different flow patters by stream lines

Pressure dependence of boiling point

Pressure dependence of melting temperature

Primary Excitation, Integral Representation

Primitive element of an extension

Primitive transformations, continuously differentiable

Principal Solution of Heat Conduction Equation

^{Principle of conservation of energy}

Principle of conservation of formal laws

Principle of mathematical induction

PRINCIPLE OF POINT OF ACCUMULATION

Principle of Special Relativity of Einstein.

Principle of virtual displacement

Products of rows of determinant

Products of sums and differences

Projection of coordinate axes into the plane of trace triangle

Projection of lattice elements

Projection of segment and line

Projection without air resistance

Proof of equality of action and reaction by means of Poggendorff’s fall device

Proof of the helium nature of a-rays

Propagation of pressure inside fluid

Proper and improper equivalence

Properties of binomial coefficients

Pseudo-inverse or generalized inverse

Purely periodic continued fractions

Purely periodic decimal fraction