对矩阵的深刻认识（A deep understanding of matrices）.docVIP

对矩阵的深刻认识（A deep understanding of matrices） The course of linear algebra, starting with the determinant or directly from the matrix, is puzzling from the beginning. For example, the application of Tongji linear algebra textbook most widely used in the national general engineering departments in teaching (now at version fourth), to introduce the inverse ordinal number with no predecessors, who have the odd concept, and then to a travel column type is not defined by the concept of direct inverse number, then some simply silly determinantal properties and exercises - it travel to a coefficient of another line, then put the cut over, got that call a lively, but dont have this thing with. Most like me mediocre student here is a little confused: even this is what things are vague, began to ring of fire drill performances, this is nonsense! So people began to skip classes, and more people began to copy their homework. This is the move, because the subsequent development can be used to describe the following sentence The path winds along mountain ridges., the determinant of this nonsense, is an equally nonsensical but a great guy out incapable of further increase of the matrix! Many years later, I realized that when the teacher was using silly parentheses in a pile of silly Ji the number in parentheses, and neither fast nor slow said: this thing called matrix, my mathematical career opened how tragic scene of a bitter, extremely brutal! Since then, the matrix has never been absent in almost all the things that are slightly stained with the two word learning. For this I cant fix a linear algebra fool, matrix boss made me often uninvited gray head broken and bleeding. For a long time, I see in reading in the matrix, as Ah Q saw false foreign devil, rubbed his forehead on a detour. As a matter of fact, Im not a special case. General engineering students often have difficulty learning linear algebra. This situation occurs both at home and abroad. Swedish mathematician Lars Gardi