In a monopoly, the supply analysis is different from that of a perfectly competitive market. In a perfectly competitive market, the supply curve is determined by the marginal cost curve of the firms. However, in a monopoly, the supply curve is determined by the marginal revenue curve.

The marginal revenue curve is the additional revenue earned by the firm by selling one more unit of output. In a monopoly, the marginal revenue curve is downward sloping, which means that the firm has to reduce its price to sell more units of output. As a result, the supply curve of a monopoly is upward sloping, which means that the firm will supply more units of output at a higher price.

The monopoly firm will always produce at a point where marginal revenue equals marginal cost. This is because the firm wants to maximize its profit, and at this point, the additional revenue earned by selling one more unit of output is equal to the additional cost incurred in producing that unit.

In a monopoly, the supply curve is not affected by the entry of new firms into the market. This is because the monopoly firm has complete control over the market and can set the price and quantity of output it produces. As a result, the monopoly firm can earn higher profits in the long run compared to a perfectly competitive market.

In conclusion, the supply analysis in a monopoly is determined by the marginal revenue curve, which is downward sloping. The supply curve is upward sloping, and the firm will always produce at a point where marginal revenue equals marginal cost to maximize its profit. The entry of new firms does not affect the supply curve in a monopoly.