mv util/lp to math/lp

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

src/util/lp/sparse_vector.h

@@ -1,53 +0,0 @@
-/*++
-Copyright (c) 2017 Microsoft Corporation
-
-Module Name:
-
-    <name>
-
-Abstract:
-
-    <abstract>
-
-Author:
-
-    Lev Nachmanson (levnach)
-
-Revision History:
-
-
---*/
-
-#pragma once
-#include "util/vector.h"
-#include <utility>
-#include "util/debug.h"
-#include "util/lp/lp_utils.h"
-#include "util/lp/lp_settings.h"
-namespace lp {
-
-template <typename T>
-class sparse_vector {
-public:
-    vector<std::pair<unsigned, T>>  m_data;
-    void push_back(unsigned index, T val) {
-        m_data.push_back(std::make_pair(index, val));
-    }
-#ifdef Z3DEBUG
-    T operator[] (unsigned i) const {
-        for (auto &t : m_data) {
-            if (t.first == i) return t.second;
-        }
-        return numeric_traits<T>::zero();
-    }
-#endif
-    void divide(T const & a) {
-        lp_assert(!lp_settings::is_eps_small_general(a, 1e-12));
-        for (auto & t : m_data) {  t.second /= a; }
-    }
-
-    unsigned size() const {
-        return m_data.size();
-    }
-};
-}