diff --git a/src/best/BestResultsTex.cpp b/src/best/BestResultsTex.cpp
index d5b1eb8..fe21f18 100644
--- a/src/best/BestResultsTex.cpp
+++ b/src/best/BestResultsTex.cpp
@@ -27,7 +27,7 @@ namespace platform {
         handler << "\\tiny " << std::endl;
         handler << "\\renewcommand{\\arraystretch }{1.2} " << std::endl;
         handler << "\\renewcommand{\\tabcolsep }{0.07cm} " << std::endl;
-        handler << "\\caption{Accuracy results(mean $\pm$ std) for all the algorithms and datasets} " << std::endl;
+        handler << "\\caption{Accuracy results(mean $\\pm$ std) for all the algorithms and datasets} " << std::endl;
         handler << "\\label{tab:results_accuracy}" << std::endl;
         handler << "\\begin{tabular} {{r" << std::string(models.size(), 'c').c_str() << "}}" << std::endl;
         handler << "\\hline " << std::endl;
@@ -62,7 +62,7 @@ namespace platform {
                 double value = table[model].at(dataset).at(0).get<double>();
                 double std_value = table[model].at(dataset).at(3).get<double>();
                 const char* bold = value == max_value ? "\\bfseries" : "";
-                handler << "& " << bold << std::setprecision(4) << std::fixed << value << "$\pm$" << std::setprecision(3) << std_value;
+                handler << "& " << bold << std::setprecision(4) << std::fixed << value << "$\\pm$" << std::setprecision(3) << std_value;
             }
             handler << "\\\\" << std::endl;
         }
@@ -76,7 +76,7 @@ namespace platform {
             double value = std::reduce(totals.at(model).begin(), totals.at(model).end()) / nDatasets;
             double std_value = compute_std(totals.at(model), value);
             const char* bold = model == best_model ? "\\bfseries" : "";
-            handler << "& " << bold << std::setprecision(4) << std::fixed << value << "$\pm$" << std::setprecision(3) << std::fixed << std_value;
+            handler << "& " << bold << std::setprecision(4) << std::fixed << value << "$\\pm$" << std::setprecision(3) << std::fixed << std_value;
         }
         handler << "\\\\" << std::endl;
         handler << "\\hline " << std::endl;
diff --git a/src/grid/GridSearch.cpp b/src/grid/GridSearch.cpp
index e9e8b64..8961a9e 100644
--- a/src/grid/GridSearch.cpp
+++ b/src/grid/GridSearch.cpp
@@ -9,7 +9,7 @@
 #include "GridSearch.h"
 
 namespace platform {
-    
+
     std::string get_color_rank(int rank)
     {
         auto colors = { Colors::WHITE(), Colors::RED(), Colors::GREEN(),  Colors::BLUE(), Colors::MAGENTA(), Colors::CYAN() };
@@ -85,11 +85,11 @@ namespace platform {
         std::mt19937 g{ 271 }; // Use fixed seed to obtain the same shuffle
         std::shuffle(tasks.begin(), tasks.end(), g);
         std::cout << get_color_rank(rank) << "* Number of tasks: " << tasks.size() << std::endl;
-        std::cout << "|";
+        std::cout << separator;
         for (int i = 0; i < tasks.size(); ++i) {
             std::cout << (i + 1) % 10;
         }
-        std::cout << "|" << std::endl << "|" << std::flush;
+        std::cout << separator << std::endl << separator << std::flush;
         return tasks;
     }
     void process_task_mpi_consumer(struct ConfigGrid& config, struct ConfigMPI& config_mpi, json& tasks, int n_task, Datasets& datasets, Task_Result* result)
@@ -360,7 +360,7 @@ namespace platform {
             //
             auto datasets_names = filterDatasets(datasets);
             json all_results = producer(datasets_names, tasks, config_mpi, MPI_Result);
-            std::cout << get_color_rank(config_mpi.rank) << "|" << std::endl;
+            std::cout << get_color_rank(config_mpi.rank) << separator << std::endl;
             //
             // 3. Manager select the bests sccores for each dataset
             //
diff --git a/src/grid/GridSearch.h b/src/grid/GridSearch.h
index 4ca7571..c910202 100644
--- a/src/grid/GridSearch.h
+++ b/src/grid/GridSearch.h
@@ -55,6 +55,7 @@ namespace platform {
         struct ConfigGrid config;
         json build_tasks_mpi(int rank);
         Timer timer; // used to measure the time of the whole process
+        const std::string separator = "|";
     };
 } /* namespace platform */
 #endif
\ No newline at end of file