# Concept Index

## "

• "Computation got stuck" message

• ## a

• Accuracy of calculations, Accuracy of calculations
• Algebraic mode
• Algebraic notation
• Algebraic simplifications
• Alternating sums
• Angle and slope of a line
• Angular mode
• Area under a curve
• Arguments, not evaluated
• Arguments, restoring
• Arranging a matrix
• ## b

• Beatles
• Bernoulli numbers, approximate
• Bibliography
• Binary numbers
• Binary operators
• Branch cuts
• Breaking up long lines
• ## c

• C language
• Caches
• Character strings
• Clearing the stack
• Coefficients of polynomial
• Columns of data, extracting
• Common logarithm
• Complex numbers
• Composite units
• Compositions
• Conditional structures
• Continued fractions
• Continuous memory
• Correlation coefficient
• Covariance
• Cross product
• ## d

• Data, extracting from buffers
• Date forms
• Daylight savings time
• Decimal and non-decimal numbers
• Declaring scalar variables
• Default simplifications
• Degree of polynomial
• Degrees-minutes-seconds forms
• Deleting stack entries
• Demonstration of Calc
• Digamma function
• Digit grouping
• Digits, vectors of
• Division of integers
• Divisor functions
• Dot product
• Duplicate values in a list
• Duplicating a stack entry
• Duplicating stack entries
• ## e

• Editing the stack with Emacs
• Editing user definitions
• Emptying the stack
• Engineering notation, display of
• Entering numbers
• Equations, solving
• Error forms
• Errors, messages
• Errors, undoing
• Euler's gamma constant, Euler's gamma constant
• Evaluates-to operator
• Evaluation of variables in a formula
• Exchanging stack entries
• Exiting the Calculator
• Exponential integral Ei(x)
• Expressions
• Extended simplification
• Extensions module
• ## f

• Fermat, primality test of
• Fibonacci numbers, Fibonacci numbers
• Fitting data to a line
• Fixed points
• Flattening a matrix
• Floating-point numbers
• Floats vs. fractions
• Flushing caches
• Formulas
• Formulas, entering
• Formulas, evaluation
• Formulas, referring to stack
• FORTRAN language
• Fraction mode
• Fractional part of a number
• Fractions
• Fractions vs. floats
• Function call notation
• ## g

• Gamma constant, Euler's, Gamma constant, Euler's
• Garbled displays, refreshing
• Generic functions
• Geometric mean, Geometric mean
• Golden ratio, Golden ratio
• Gregorian calendar
• Grouping digits
• Guard digits, Guard digits
• ## h

• Harmonic mean
• Harmonic numbers
• Hash tables
• Help commands
• Histograms
• Horizontal scrolling
• Hours-minutes-seconds forms
• ## i

• Identity matrix
• Implicit comma in vectors
• Implicit multiplication
• Incomplete algebraic mode
• Incomplete complex numbers
• Incomplete interval forms
• Incomplete vectors
• Index tables
• Inexact results
• Infinite mode
• Infinity
• Integer part of a number
• Integers
• Integration by Simpson's rule
• Integration, numerical
• Interval forms
• Inverse of permutation
• Iterative structures
• ## j

• Julian calendar
• Julian day counting
• Julian day counts, conversions
• ## k

• Keyboard macros
• Keyboard macros, editing
• Kill ring
• Knuth, Art of Computer Programming
• ## l

• Lambda expressions
• Last-arguments feature
• Least-squares fits
• Least-squares for fitting a straight line
• Least-squares for over-determined systems
• Levels of stack
• Line breaking
• Line, fitting data to
• Linear correlation
• Linear equations, systems of
• Linear regression
• Linearity testing
• Lists
• Local variables
• Looping structures
• ## m

• Maple language
• Marginal notes
• Matchstick problem
• Mathematica language
• Matrices
• Matrix display
• Matrix mode
• Maximizing a function over a list of values
• Maximum of a function using Calculus
• Mean of data values
• Median of data values
• META key
• Minimization, numerical
• Minus signs
• Mistakes, undoing
• Mode line indicators
• Modulo division
• Modulo forms
• Multiplication, implicit
• ## n

• Nameless functions
• Narrowing the stack
• Negative numbers, entering
• Newton's method
• Non-decimal numbers
• Normalizing a vector
• Numerator of a fraction, extracting
• Numeric entry
• Numerical integration
• Numerical Recipes
• Numerical root-finding
• ## o

• Octal integers
• Operands
• Operators
• Operators in formulas
• Over-determined systems of equations
• ## p

• Parsing formulas, customized
• Parts of formulas
• Pascal language
• Pattern matching
• Performance
• Permanent mode settings
• Permanent user definitions
• Permanent variables
• Permutation, inverse of
• Permutations, applying
• Perpendicular vectors
• Phi, golden ratio, Phi, golden ratio
• Plain vectors
• Polar mode
• Polynomial, list of coefficients
• Population statistics
• Positive infinite mode
• Precedence of operators
• Precision of calculations
• Primes
• Principal values
• Product of a sequence
• Programming with algebraic formulas
• Programming with keyboard macros
• Pythagorean Theorem
• ## q

• Quaternions
• Quick Calculator
• Quick units
• Quick variables
• Quitting the Calculator
• ## r

• Rank tables
• Recalling variables
• Reciprocal
• Recursion
• Recursion depth
• Redoing after an Undo
• Refreshing a garbled display
• Removing stack entries
• Reshaping a matrix
• Restoring saved modes
• Retrieving previous results
• Rewrite rules
• Root-mean-square
• Roots of equations
• Round-off errors
• Roundoff errors, correcting
• Roundoff errors, examples, Roundoff errors, examples
• Roundoff errors, in non-decimal numbers
• RPN notation
• Running the Calculator
• ## s

• Sample statistics
• Saving mode settings
• Scalar mode
• Scientific notation, display of
• Scientific notation, entry of
• Scientific notation, in non-decimal numbers
• Scrolling
• Selections
• Sets, as binary numbers
• Sets, as vectors
• Simpson's rule
• Sine integral Si(x)
• Slope and angle of a line
• Solving equations
• Sorting data
• Speed of light
• Square-free numbers
• Stack basics
• Stack levels
• Standalone Operation
• Standard deviation
• Standard deviations
• Standard user interface
• Starting the Calculator
• Statistical functions
• Storing user definitions
• Storing variables, Storing variables
• Strings
• Sub-formulas
• Subscript notation
• Summation of a series
• Summations (by keyboard macros)
• Summations (statistical)
• Summing rows and columns of data
• Symbolic mode
• Syntax tables
• Systems of equations, numerical
• Systems of equations, symbolic
• Systems of linear equations
• ## t

• Temperature conversion
• Temporary assignment to variables
• TeX language
• Time of day
• Time travel
• Time zones
• Time Zones, converting between
• Torus, volume of
• Total algebraic mode
• Trail buffer
• Trail pointer
• Transformations
• Triangular lists
• Truncating the stack
• ## u

• Un-storing variables
• Unary operators
• Undoing mistakes
• Unit vectors
• Unix time format
• Unix time format, conversions
• Unsafe simplifications
• User-defined units
• ## v

• Variables, evaluation
• Variables, in formulas
• Variables, temporary assignment
• Variance of data values
• Vectors
• Vertical scrolling
• Void variables
• ## w

• Why did an error occur?
• Wide text, scrolling
• Word size for binary operations
• Working messages