diff --git a/Sheet5/mylib.h b/Sheet5/mylib.h
deleted file mode 100644
index 0a5ddd9..0000000
--- a/Sheet5/mylib.h
+++ /dev/null
@@ -1,68 +0,0 @@
-#pragma once
-#include <cassert>
-#include <iomanip>             // setw()
-#include <iostream>
-#include <omp.h>
-#include <vector>
-
-/**     Inner product
-    @param[in] x    vector
-    @param[in] y    vector
-    @return         resulting Euclidian inner product <x,y>
-*/
-double scalar(std::vector<double> const &x, std::vector<double> const &y);
-double scalar_trans(std::vector<double> const &x, std::vector<double> const &y);
-
-/**  Second inner product: use #pragma omp parallel (no "for" in pragma)
-    The work is split manually inside the parallel region (stride or chunk).
-*/
-double scalar_manual(std::vector<double> const &x, std::vector<double> const &y);
-
-/**     l2-norm
-    @param[in] x    vector
-    @return         resulting Euclidian norm
-*/
-double norm(std::vector<double> const &x);
-
-/**      Vector @p b adds its elements to vector @p a .
-    @param[in] a    vector
-    @param[in] b    vector
-    @return          a+=b componentwise
-*/
-template<class T>
-std::vector<T> &operator+=(std::vector<T> &a, std::vector<T> const &b)
-{
-    assert(a.size()==b.size());
-    for (size_t k = 0; k < a.size(); ++k) {
-        a[k] += b[k];
-    }
-    return a;
-}
-
-// Declare the reduction operation in OpenMP for an STL-vector (existing)
-#pragma omp declare reduction(VecAdd : std::vector<int>  : omp_out += omp_in) \
- initializer (omp_priv=omp_orig)
-
-/**     Test for vector reduction.
- *  existing: converts thread-private vectors into a componentwise sum
- *  @param[in] n  size of global/private vector
- *  @return  resulting global vector.
-*/
-std::vector<int> reduction_vec(int n);
-
-/**     New: append per-thread vectors into a single big vector.
- *  The result will have size n * numThreads, where each thread contributes a contiguous block.
- */
-std::vector<int> reduction_vec_append(int n);
-
-/**     Output of a vector.
-    @param[in,out] s    output stream
-    @param[in]     x    vector
-    @return        modified output stream
-*/
-template <class T>
-std::ostream &operator<<(std::ostream &s, std::vector<T> const &x)
-{
-    for (auto const &v : x)  s << std::setw(4) << v << "  ";
-    return s;
-}