2.4/changes

Changes in 2.4.18: + improve mathml representation of prime chars Changes in 2.4.17: + add xsl templates for boolean expressions Changes in 2.4.15: + fix evaluation of fraction with numeric denominator Changes in 2.4.14: + fix simplification of Vector/MatrixVariable Changes in 2.4.13: + fix XSL transformation for unary minus (again) Changes in 2.4.12: + add expand operator + do not evaluate exp(-x) to 1/exp(x) ; use simplify instead + do not simplify log(a*x) to log(a)+log(x) ; use elementary instead + fix simplification of comparison Changes in 2.4.9: + fix MathML representation of nested polynomials Changes in 2.4.8: + fix string representation of constants and functions with both primes and indices + expand parameters of graph and substitute Changes in 2.4.7: + fix function add and multiply Changes in 2.4.6: + implement taylor series + implement multiple factorials + fix XSL transformation for compound indices + fix XSL transformation for some exotic characters + fix XSL transformation for unary minus Changes in 2.4.4: + fix XSL transformation for complex Changes in 2.4.2: + fix euler phi Changes in 2.4.1: + fixed bugs in XSL stylesheets Changes in 2.4: + added a JSCL scripting engine + added functions for graphing + improved XSL stylesheets + improved MathML output Changes in 2.3_05: + downgraded to jeuclid-3.0.3 patched against the sqrt issue in pdf + can run in 1.4, just with no MathML renderings Changes in 2.3_04: + font size of MathML fractions increased, now readable + fixed endless loop when multiplying geo_buckets + txt extension added automatically at saveAs + Variable.valueOf(String[]) + added version number in "About" Changes in 2.3_03: + incorporated jeuclid 3.1.0 snapshot to solve square root pdf issue + font of various export formats set to monospace Changes in 2.3_02: + export to TeX + upgraded to jeuclid-3.0.2 ; as a result meditor must now run on 1.6 ; export to PDF + swing GUI compiles under gcj Changes in 2.3_01: + new interface with tree to navigate files + use of Java look and feel Graphics Repository icons + got rid of "working" dialog which refused to close in 1.6 + trailing nulls in document when loading multibyte encodings : fixed + doubleVariable.symbolic() Changes in 2.3: + Generic.powerValue() returns custom class instead of object array + JSCLInteger, Rational declared final + polynomial API reworked and put in a separate package + a Term class representing monomial+coef + polynomial head & tail return term instead of monomial & coef + polynomial.coefficient(monomial) + polynomial iterators + array polynomial declined by coef type + tree polynomial, list polynomial + Ordering class that extends Comparator + generalized use of Basis.compute() flags argument + a flag for Gebauer & Moeller setting, set as default + math objects created by means of factories + ModularInteger, JSCLBoolean + parsers moved in text package + MathML moved in mathml package + two new interfaces : jscl.math.Field and jscl.math.polynomial.DegreeOrdering + Block selection strategy set to "first pair" when in non-degree ordering Changes in 2.2: + protected access to various fields in Variable, Constant, Function, Root, ImplicitFunction, Operator + variable.name(), constant.prime(), constant.subscript(), function.parameters(), root.subscript(), implicitFunction.derivation(), implicitFunction.subscript(), operator.parameters() + GB computation defaulted to sugar/sloppy + polynomial code rewrite + MathML class gathering all MathML related stuff + compiles under gcj + an implementation of T Yan's GeoBuckets Changes in 2.1_02: + integer fraction first in ordering + an implementation of JC Faugere's F4 algorithm + a new Groebner algorithm "block" + a new package "groebner" + rational and modular polynomial.normalize() make head coefficient equal to one + rational arithmetically compatible with expression + polynomial code reworked + substitute(x,list,list) + (-1)^x "to mathml" = -1^x fixed + integral of exp(a+b*x) + cubic(x) != x^(1/3) for x<0. Changes in 2.1_01: + solution of cubic equation in the positive discriminant case fixed + solution of quartic equation fixed + primitiveroots returns NullPointerException when there aren't any : fixed Changes in 2.1: + Groebner Basis code completely reworked + code cleanup : remaining non Collection classes replaced + various API adjustments : JSCLInteger content made accessible, Rational made accessible, polynomial.monomial(literal) made accessible Changes in 2.0_04: + math rendering of a[i] fixed + additional flags argument to Basis.compute() + x^(1/-2) "expand/simplify" NegativeArraySizeException fixed + (-1)^x "expand/simplify" = -1^x fixed + cotangent Changes in 2.0_03: + factorization improved + anti-aliased math rendering + underscores '_' and periods '.' allowed in identifiers Changes in 2.0_02: + integral(1/(2*(1+z)^2),z) = (-1)/(1+z) fixed Changes in 2.0_01: + integral((x^4 + 2*x^2 + 2*x + 1) / x^3, x) fixed + geometric product in arbitrary Cl(p,q) algebra + reintroduced coef() + graph.bsh example fixed + Basis.compute() now static Changes in 2.0: + graphical rendering of math expressions + complete redevelopment of the interface with netbeans + rewrite of the low-level engine (data structures) + the power operator ^ is right-associative as it should + powers fenced in MathML + functions with subscripts + switched primes and subscripts in constants + Constant.PRIMECHARS = 3 instead of 2 + d'Alembertian operator added + conjugate(exp(x)) = exp(conjugate(x)) and the same for log + (-1)^(1/2)=NaN fixed + Complex.valueOf(0.,0.).pow(numeric) = NaN+NaN*sqrt(-1) fixed + 0^0.0 "numeric" = NaN now yields 1.0 + 0^0.0 "expand" = 0 now yields 0^0.0 + boolean GB computation fixed + conversion to xhtml : math tags replaced by double brackets as delimiters + "copy to wiki" operation + xhtml to LaTeX conversion utility (mmltex) + sqrt(-1) first in ordering + equations disabled as rendering input : the equal sign must stay outside of the rendered expressions + comparison functions Changes in 1.0_04: + fixed a bug with greater than or equal operator + Export to XHTML converts the whole document into a XHTML file + implemented integral of f(a+b*x) where f=trigonometric function + the simplifier avoids using the trigonometric identities Changes in 1.0_03: + avoided simplifying log(exp(x)) to x + FileReader not closed : fixed + can parse an EquationOrExpression with equal sign Changes in 1.0_02: + subclasses of GenericVariable made non-public + subclasses of MultivariatePolynomial made non-public + implemented MultivariatePolynomial.divide and remainder + polynomial.remainderUpToCoefficient() + 81^(1/4) (expand) fails : fixed + some number-theoretic functions : modpow, modinv, eulerphi, primitiveroots Changes in 1.0_01: + (1+x-x^5)*(1-x+x^5) (expand) (factorize) fails : fixed Changes in 1.0: + a test suite for substitutions + some groebner benchmark timings + geometric product and differential operator (Feature Request item #890925) + fixed the quaternion product Changes in 1.0rc4: + an exception is thrown when multiplying matrices without matrix() (Bug item #869813) + computation of nth roots Changes in 1.0rc3: + a new Generic type which inherits from Arithmetic + Arithmetic limited to the 4 arithmetic operation and becomes an interface + polynomial.reduceCompletely() becomes polynomial.reduce(completely) + overloaded comparison and arithmetic methods Changes in 1.0rc2: + added a command mode launcher : bin/jscl + symbolic parameters allowed in matrix etc. operators + a change of reduction strategy improves groebner performance Changes in 1.0rc1: + file opening via drag and drop + fixed a mistake with anti/derivative of conjugate() Changes in 0.99: + a conjugate() function + tested to work on jdistro + bug with scrollbar when resizing fixed + (2+2*x+y)*(2+x+2*y) (expand) (factorize) ClassCastException : fixed (Bug item #851149) Changes in 0.98: + pseudo-NumericWrapper to enable latest version on MIDP + used mfenced mathml tag + a mathml to tex conversion howto (see docs) + various improvements Changes in 0.97: + separated Numeric from Arithmetic + separated UnivariatePolynomial from MultivariatePolynomial + groebner() returns a vector + graphing (see examples) Changes in 0.96: + fixed a performance problem with the factorization Changes in 0.95: + java code generation + matinv replaced by 1/matrix + expand evaluates the functions + a numeric package + a nested polyonmial Changes in 0.90: + numerics (except on MIDP which doesn't support floating point) + formalized the type conversions + complex and quaternion products + jacobian, laplacian + moved vector/matrix/product operations into a package of their own Changes in 0.80: + the simplifier knows of some additional trigonometric identities + factorization code improved + Polynomial no more inherits from Arithmetic and becomes abstract + a new MultivariatePolynomial class + an own zaurus software package + fixed a bug with hyperbolic function names + added abs, sgn + added div, mod + renamed divg as diverg + implemented matrix inverse Changes in 0.77: + developed some junit tests + replaced coef() by solve() + created a new Rational type + added kth-elimination ordering + changes in groebner() syntax and implementation + simplification improved + removed Factorized*, OptimizedExpression + moved trigonometric/hyperbolic functions into a package of their own + changed ch, sh, th, argch, argsh, argth into cosh, sinh, tanh, acosh, asinh, atanh + put parser/format related code in jscl.text package + "modified" status of the awt editor should now behave correctly under j2me-pp1.0 + the factorization is recursive + fixed a limitation of antiderivative() with respect to integral+expand() Changes in 0.76: + (3+x)*(4+x) (expand) (factorize) not working : fixed (Bug item #736503) + made use of the Java Collections Framework data structures + stopped using NotDivisibleException in monomial divisibility checks, resulting in performance improvement + a new distribution for Personal Java (jdk1.1) devices : meditor-pjava Changes in 0.75: + FileNotFoundException's taken into account + (1+x)^(1/x) (simplify) infinite loop fixed + (1-x+x^5)^2 (expand) (factorize) = (1-x-a4*x^4+x^5)*(1-x+a4*x^4+x^5) fixed + packages renamed and re-organized Changes in 0.74: Jan 20 2003 integral(x/(1+x)^2,x) = 1/(1+x) fixed Jan 13 2003 Expression and Variable.valueOf(String) throw ParseException Nov 1 2002 integral(x/(x^3+1),x) NullPointerException fixed Oct 12 2002 computations execute in a separate thread Oct 8 2002 Ctrl+Z = Undo, Simplify = Ctrl+Q Sep 21 2002 separated elementary function decomposition from simplification Sep 7 2002 changed the notation for partial derivatives Jun 7 2002 integral(x+7/5,x) = x*(7+5*x)/5 fixed Jun 5 2002 Inv inherits from Frac May 20 2002 "!" instead of fact, "^" instead of pow Apr 20 2002 changed Arithmetic from interface to abstract class Mar 29 2002 translated the whole API into english Mar 8 2002 port on midp1.0 Mar 2 2002 renamed divergence as divg Feb 18 2002 the modulo is a parameter instead of being global Feb 16 2002 used "/" instead of inv and frac Jun 11 2001 port on jdk1.3/swing Mar 18 2001 added an undo command Mar 11 2001 grammar simplification Jan 24 2001 the classloading of Variable used to fail in modular mode : fixed Jan 7 2001 runtime exceptions are handled at GUI level Dec 7 2000 only one menu command ("expand") and associated syntax changes Dec 3 2000 important syntax changes toward compatibility with other software Nov 29 2000 several GUI bug fixes