�U�@��:
p = 2 ������
�W�@��:
�G���� Congruence Equations
�e�@��:
�G�� Congruence Equation ����²
��
x
2
a
(mod
p
n
)
�b�e�@�`���ڭ̪��D�@�ӤG���� congruence equation �i��²��
x
2
a
(mod
p
n
), �䤤
p
�����,
n
�B
p
a
�o�اΦ������D. �n�`�N���ɥѩ�
p
a
, �Y
x
2
a
(mod
p
n
) ����, �h��ѥ��]�P
p
����, �_�h�|�y��
p
|
a
���٬�. ���ۧڭ̴N��
p
= 2 �M
p
���_��ƨ�ر��ΨӰQ��
x
2
a
(mod
p
n
) �Ѥ����p.
Subsections
p
= 2 ������
p
���_��ƪ�����
Li 2007-06-28
a(mod pn)
a(mod pn), �䤤 p �����,
n 
�B p
a
�o�اΦ������D. �n�`�N���ɥѩ� pa, �Y
x2 a(mod pn) ����, �h��ѥ��]�P p ����, �_�h�|�y�� p| a ���٬�.
���ۧڭ̴N�� p = 2 �M p ���_��ƨ�ر��ΨӰQ��
x2 a(mod pn) �Ѥ����p.