mismatch in function isMatrix()

[Dev AM]

If i call on a parsed AST the function isMatrix() this returns true for the expression {{5,7,1},{{5,10},{2,1},{0,0}}} which is not clearly a matrix! Is this correct?

[Axel Kramer]

the isMatrix() method should return null in your example? See: https://bitbucket.org/axelclk/symja_android_library/src/943ff85578ba9a33a8ad1b372369a7baa9de355c/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/AST.java?at=master