Change log

Summary of changes for release candidate 1484 - display of variable and function binding - new data types for complex, row- and column-vectors - root finding by Newton's method - symbolic root finding for polynomials - keyboard caches special symbols - pinch-spread/shift-scroll gestures for text size - modified touch/mouse adapter - enhanced symbolic recognition of numeric constants - introduction of alternate complex notation ⅉ - better support for constant of integration ĉ - Euler transformation - linear systems and linear surfaces

Major changes by build number

Build	Description
1473	Android keyboard repairs
1474	Pinch-Zoom/shift-scroll: algebra, replay, grammar, plot
1475	Preferences registry
1476	Refactored replay and grammar to use platform-independent touch/mouse adapter and common helper
1477	Fixed problem with Unicode → when generating function signature
1479	enhanced special simplification of sin, cos, tan, cot, sec, csc for fractions of pi
1480	rebuilt common TouchInterface and referencing desktop TouchListener and tablet TouchListener
1481	introduced alternate complex notation using ⅉ, added simplification rules, added Euler transformation
1482	added subtypes for bool, integer, real, complexj to make subtype discrimination more efficient; test for Type.real changed to Type.isNumeric() is true for all for numeric types.
1483	Substitution and transformation rules will be discarded if they are not referenced again within a minute.
1484	Internal release candidate
1485	Internal release candidate
1486	Internal release candidate
1487	Internal release candidate
1488	Internal release candidate
1489	Internal release candidate
1490	Internal release candidate

Minor changes by build number

Build	Description
1478	Fixed problem problem with display of ⅈ as exponent
1478	title of substitution selection dialog
1478	special simplification of cos (ℼ÷2) yielded a number close to zero; fixed by using createConst(Math.round(value)) when isInteger(value) is true
1478	changed display of (0,-1)i to (-1)ⅈ
1479	fixed inconsistency in special simplify applied to matrix which was not consistent with special simplify applied to tuple
1479	move expansion of 5/4 to 1+1/4 from special simplify to distribute
1479	factor applied to complex expression separates the real from the complex
1479	move-left/-right applied to denominator of real or imaginary part of complex expression multiplies both parts by the denominator and multiplies the complex by the inverse of the denominator.
1479	special simplify applied to a complex value applies special simplification to each component in turn, consistent with special simplification for tuples and matrices
1479	fixed bug in simplification generator: depatterning converted ?* to var instead of leaving it as expression
1479	added rule for combining complex exponents of multiplicands to complex simplifier
1479	changed complex variables to use bold case: x i displays as xⅈ
1479	the derivative of a complex value is a complex value composed of the derivatives of the real and imaginary parts
1479	factor applied to a component of a complex value sets that component to 1, divides the other component by the factor and multiplies the result by the factor; (a, b)ⅈ factored on a yields a⋅(1, b÷a)ⅈ and (a, b)ⅈ factored on b yields b⋅(a÷b, 1)ⅈ
1479	click on folder in properties display failed due to bad parsing in ExprParagraph with empty «»
1479	double click in plotter (desktop) problem introduced in build 1476
1480	more tlc on touch listener; abandoned double click because it slows down user experience on single clicks
	complex simplification permitted complex imaginary part (illegal)
	enhanced integer exponentiation of complex with zero real part to include non-constant imaginary part
	repaired factor for subtract with leading negation: -(2⋅x)-2⋅x factors to -(2⋅x-x)
1481	repairs to equation isolator
	added appendix "fundamentals" to guide
	android: fixed save/restore for keyboard state
1482	arg function for complex
	(sin (A+B)) !distribute=sin A⋅cos B+sin B⋅cos A
	(30+45) ° !distribute=30 °+45 °
	convergent simplification used in matrix reduction
	inline selection support for all rootable types and integral decorations
	auto-morph numeric to integer, real
1485	Fixed a bug in alignment expression where old right side was left denested
	constant of integration now combines with other constants
	special characters in ExpressionModel replaced with Unicode.symbol references
1486	APK failed to find license file
	Android: honour penSize when measuring div and drawing horizontal lines; issue arises on high-resolution tablets
	Android: fixed bug in auto-keyboard selection; fixed keyboard-specification tables
1487	PolynomialExpression parser returned error instead of throwing exception
1488	Documentation updates
1489	Updated copyright date to 2018
	bug in scanner due to Unicode char in string literal; replaced with \uxxxx notation
	Android: Gauss helper buttons not working, caused by lack of license feature; modified listener to complain of missing license feature
	Android: missing search button in bookreader on small screens; added (redundant) Search item to menu
	Android: tweaked plotter to use screen density on high-density devices
	tweaked painter in grammar component for better display of text (antialiasing)
1490	Android: changed location of myron files from getUserDir() to getFilesDir() to conform with usage of FilesProvider; repaired email interface
	ExprRelop now checks both sides for hasArray() before calling comparing two arrays; previously would fail when comparing a collection to a scalar
	Fixed a bug in ViewModel restoration that left descent as always zero
	Android: Revised Dropbox interface
	Removed books dialog. Extra books are read from the Files display and are redisplayed using the book icon. The Myron Guide is redisplayed implicitly in response to context-sensitive help or explicitly using System Myron Guide
	Desktop: Changed system property java.io.tmp to ~user/Myron/tmp. Debian has permissions on /tmp that prohibit a non-setuid user from creating files there. This issue shows up when SwingPainter fails to load fonts from jar resources. Turns out creating a font requires access to the /tmp folder.
	Updated installers for Windows and Linux.

Code size

Project	Lines of code
AlgebraExpression	64197
AlgebraGeometry	986
AlgebraGen	2186
AlgebraRegression	6830
AlgebraSwing	11399
AlgebraAndroid	13973
DropboxChooser	594
BookBuilder	4859
Common	4369