Explanation
In India, the number of judges in the Supreme Court can be altered by the Parliament through the process of passing a law. This is because the number of judges in the Supreme Court is determined by the law enacted by the Parliament, specifically, the Supreme Court (Number of Judges) Act, 1956.
The President does not have the power to alter the number of judges in the Supreme Court by issuing an order. However, the President does have the power to appoint judges to the Supreme Court, in consultation with the Chief Justice of India and other senior judges.
The Supreme Court also does not have the power to alter the number of judges by issuing a notification. The Supreme Court has the power to interpret the Constitution and laws of the land, and to ensure their proper implementation. However, the number of judges in the Supreme Court is a matter that is determined by the Parliament through the process of law-making.
Similarly, the Central Government also does not have the power to alter the number of judges in the Supreme Court by issuing a notification. The Central Government, through the Ministry of Law and Justice, provides support and assistance to the Supreme Court in various matters, but it does not have the power to alter the number of judges in the Supreme Court.
