The vigesimal system, which is a base-20 system, is the basis for the Papua New Guinea counting system. This system is thought to have been introduced to Papua New Guinea by Indian traders.

The yupana is a Papua New Guinea counting board that is used to perform mathematical calculations. It consists of a series of beads that are arranged on a grid. The beads are moved around the grid to represent different numbers.

The vigesimal system, which is a base-20 system, is used to represent numbers in the yupana. This system is thought to have been introduced to Papua New Guinea by Indian traders.

The transfinite is a Papua New Guinea mathematical concept that is used to represent the concept of infinity. It is a set that is larger than any finite set.

The empty set is used to represent the concept of zero in the yupana. This is because the empty set is a set that contains no elements.

The negation is a Papua New Guinea mathematical concept that is used to represent the concept of a negative number. It is the opposite of a positive number.

The vigesimal system, which is a base-20 system, is used to represent the concept of a fraction in the yupana. This system is thought to have been introduced to Papua New Guinea by Indian traders.

The dot is a Papua New Guinea mathematical concept that is used to represent the concept of a decimal point. It is a small dot that is placed between the whole number part and the fractional part of a number.

The percent sign is a Papua New Guinea mathematical concept that is used to represent the concept of a percentage. It is a symbol that is used to indicate that a number is a percentage.

The colon is a Papua New Guinea mathematical concept that is used to represent the concept of a ratio. It is a symbol that is used to separate the numerator and the denominator of a ratio.

The proportion sign is a Papua New Guinea mathematical concept that is used to represent the concept of a proportion. It is a symbol that is used to indicate that two ratios are equal.

The sequence is a Papua New Guinea mathematical concept that is used to represent the concept of a sequence. It is a set of numbers that are arranged in a specific order.

The sum is a Papua New Guinea mathematical concept that is used to represent the concept of a series. It is the total of a set of numbers.

The limit is a Papua New Guinea mathematical concept that is used to represent the concept of a limit. It is the value that a function approaches as the input approaches a certain value.

The derivative is a Papua New Guinea mathematical concept that is used to represent the concept of a derivative. It is the function that gives the rate of change of a function with respect to its input.