Sabem de nada! Não entendem de Rio! No mesmo espaço que cabem 660 mil britânicos, cabem 2.2 milhões de brasileiros animados e felizes! E calientes! 😉🧐🤓😎 BBC is probably having some connections with Brazilian newspaper Folha de São Paulo. My God. They don’t understand the flow of people and the size of Copacabana Beach. Worse than that, they think we Brazilians stay away from each other as the British. We cariocas (Brazilians born in Rio) stay very close to each other. There’s much more people per square meter than what they are used to in Great Britain. We are tropical and warmer. I will invite them to spend some time in Rio and they probably will get in a better mood. Look at the figures we used to get to 2.2 million people in Copacabana Beach doing Lady Gaga concert: Here’s a parametric equation that incorporates even-order derivatives to express the estimated crowd size P at the Lady Gaga concert in Copacabana: 📘 Definitions: •A: fixed effective area of Copacabana Beach used (in m²) •D(t): time-dependent crowd density function (people/m²) •F(t): time-dependent flow multiplier (turnover/rotation factor) •C(t): correction factor for usable space •\frac{d^n}{dt^n}: the n^\text{th} derivative with respect to time t, where n is even ⸻ 💡 Interpretation: •The second derivative of D(t) captures the acceleration of crowd density change — e.g., surges when show starts. •The fourth derivative of F(t) captures complex dynamic flow changes across time — like waves of arrival and departure. •The second derivative of C(t) may model evolving spatial constraints — e.g., due to tide or emergency clearance.