public float tf(int freq, int passageLen) {float norm = k1 * ((1 - b) + b * (passageLen / pivot));return freq / (freq + norm);}

public float tf ( int freq , int passageLen ) { float norm = k1 * ( ( 1 - b ) + b * ( passageLen / pivot ) ) ; return freq / ( freq + norm ) ; }
public virtual float Tf(int freq, int passageLen){float norm = k1 * ((1 - b) + b * (passageLen / pivot));return freq / (freq + norm);}
