Diving into the water without an oxygen tank is called ‘free-diving.’ It is a form of apnea diving in which divers must hold their breath for an extended period while diving deep into the water with just one breath of oxygen. The difficulty in holding the diver’s breath during this time is not due to a lack of oxygen but rather an increase in carbon dioxide concentration. In other words, if you keep your heart rate low and your metabolism slow, you produce less carbon dioxide, which allows you to dive for a longer duration. The only way to maintain a low heart rate is to remain as calm as possible. Maintaining calmness has numerous benefits in life. - Joseph’s “just my thoughts”
In mathematics, a "recursive proposition" is a proposition whose true or false value is fed back into the proposition itself. For example, "I can never allow this to happen before I die!" is a recursive proposition. Unfortunately, the condition for proving that this is possible is that I die. The problem is that you are dead once, you can not be longer the person who gives permission. This phenomenon also occurs in the investment business. The most common example of this is an investment in stocks. This is a recursive proposition because if the price of a stock goes up and you sell it, the sales volume directly affects the price. Therefore, the number of shares (trading volume) is one of the most important factors to be considerable when investing in stocks. This property of recursive propositions is a good explanation for why the large trading of stock volumes is difficult to work. - Joseph’s “just my thoughts”