    start_y = 1.0;
    end_step_length = 0.3
    
    solver_1_eq_2_temp = solver_1_eq_2;
    solver_1_eq_1_temp = solver_1_eq_1;    
    end_step_length_temp = end_step_length;
}
set_solver_1();

function invalidate_solver_1(client_x, client_y){
    var solver = document.getElementById("solver_1");
    var canvas_rect = solver.getBoundingClientRect();
    if(document.getElementById("button_1").disabled) {
           eval("solver_1_eq_" + solver_1_eq_temp_id + " = Array.from(" + name + "solver_1_eq_" + solv