203477c3a8
Verification of Przytycki's congruence works fine, however there are some small modifications that could be made. The, naive, approach to the verification of periodicity congruence for the Khovanov polynomial didn't work. There are just too many cases to check. Generation of all of them can exhaust the memory.
76 lines
1.6 KiB
C++
76 lines
1.6 KiB
C++
#ifndef _KNOTKIT_ALGEBRA_GRADINGS_H
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#define _KNOTKIT_ALGEBRA_GRADINGS_H
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class grading
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{
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public:
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int h, q;
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public:
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grading () : h(0), q(0) { }
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grading (int h_, int q_) : h(h_), q(q_) { }
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grading (const grading &gr) : h(gr.h), q(gr.q) { }
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grading (grading&& gr) : h(std::move(gr.h)), q(std::move(gr.q)) {
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gr.h = gr.q = 0;
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}
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grading (reader &r)
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{
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h = r.read_int ();
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q = r.read_int ();
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}
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~grading () { }
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grading &operator = (const grading &gr) { h = gr.h; q = gr.q; return *this; }
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grading& operator = (grading&& gr) {
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h = std::move(gr.h);
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q = std::move(gr.q);
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gr.h = gr.q = 0;
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return *this;
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}
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grading operator + (const grading &gr) const
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{
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return grading (h + gr.h, q + gr.q);
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}
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grading operator - (const grading &gr) const
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{
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return grading (h - gr.h, q - gr.q);
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}
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grading &operator += (const grading &gr)
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{
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h += gr.h;
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q += gr.q;
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return *this;
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}
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grading &operator -= (const grading &gr)
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{
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h -= gr.h;
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q -= gr.q;
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return *this;
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}
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bool operator == (const grading &gr) const { return h == gr.h && q == gr.q; }
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bool operator != (const grading &gr) const { return !operator == (gr); }
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bool operator < (const grading &gr) const
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{
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return h < gr.h
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|| (h == gr.h && q < gr.q);
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}
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grading mirror_grading (unsigned nplus, unsigned nminus, bool torsion) const;
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void write_self (writer &w) const
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{
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w.write_int (h);
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w.write_int (q);
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}
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void show_self () const;
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void display_self () const;
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};
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#endif // _KNOTKIT_ALGEBRA_GRADINGS_H
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