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using System;
using System.Collections.Generic;
using System.Text;
namespace FormulaEditor
{
/// <summary>
/// Equality operation
/// </summary>
public class EqualityOperation : IObjectOperation, IFormulaCreatorOperation
{
/// <summary>
/// Variable for type definition
/// </summary>
private const Boolean b = false;
/// <summary>
/// The singleton
/// </summary>
public static readonly EqualityOperation Object = new EqualityOperation();
/// <summary>
/// Constructor
/// </summary>
private EqualityOperation()
{
}
/// <summary>
/// Arity of this operation
/// </summary>
public int Arity
{
get
{
return 2;
}
}
/// <summary>
/// Calculates result of this operation
/// </summary>
public object this[object[] x]
{
get
{
return x[0].Equals(x[1]);
}
}
/// <summary>
/// Return type
/// </summary>
public object ReturnType
{
get
{
return b;
}
}
/// <summary>
/// The "is powered" sign
/// </summary>
public bool IsPowered
{
get
{
return false;
}
}
/// <summary>
/// Creates formula
/// </summary>
/// <param name="tree">Operation tree</param>
/// <param name="level">Formula level</param>
/// <param name="sizes">Sizes of symbols</param>
/// <returns>The formula</returns>
public MathFormula CreateFormula(ObjectFormulaTree tree, byte level, int[] sizes)
{
return OptionalOperation.CreateFormula(this, tree, level, sizes, "=");
}
/// <summary>
/// Operation priority
/// </summary>
public int OperationPriority
{
get
{
return (int)ElementaryOperationPriorities.Comparation;
}
}
}
}
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Ph. D. Petr Ivankov worked as scientific researcher at Russian Mission Control Centre since 1978 up to 2000. Now he is engaged by Aviation training simulators http://dinamika-avia.com/ . His additional interests are:
1) Noncommutative geometry
http://front.math.ucdavis.edu/author/P.Ivankov
2) Literary work (Russian only)
http://zhurnal.lib.ru/editors/3/3d_m/
3) Scientific articles
http://arxiv.org/find/all/1/au:+Ivankov_Petr/0/1/0/all/0/1